Did you discover your Synology beeping at you? Â Did you get a SMS message on your phone or an email saying “Volume 1 on NASname is in degraded mode [3/4]”?
Well then, you my friend are in need of this post…
Dealing with a failed hard drive…
Take a look at your NAS. Â The Status light should be blinking yellow and the failed hard drive number will be indicated on the HDD lights. Â Log into your NAS verify if Synology is reporting that a drive is degraded, defective or crashed. Â You will see several notifications in the upper right corner, one of them will be labelled, “System beep reminder. Volume 1: Degraded.”
First things first. Â Let’s s stop the incessant beeping of your Synology by going to Main Menu (drop down arrow in upper left corner) > Storage manager > Volume, and clicking on the “Beep off” button. Â You should also see more details about the status of your hard drives.
If for some reason you don’t have any red text like in the screenshot shown above you should check your log file by going to: Main Menu > System Information and selecting the last tab labelled “Log” to see what issue is being reported.
Look for red X’s that will have event messages that look something like: “Volume [1] was degraded, please repair it.”, “Write error at md2 disk2 sector 12345678”, “Internal disk [1,2,3 or 4] was defective.” or “System volume [x] was degraded, current disk status [3/4], please repair it.”
If the data is important and you haven’t backed it up, please do so. Â Your NAS is currently running with no safety net if another drive fails (unless you are using SHR with 2 drive redundancy). Â Please backup your data before proceeding. Â If you don’t have enough storage space to backup your NAS you may want to look at buying more hard drives ($60-$90 per TB for life of drive) or using Amazon S3 backup ($143 per TB per month adds up). Â You can find details on how to setup Synology to backup to Amazon S3Â here.
Choosing the hard drives…
You can see my previous post on shopping for a new hard drive here. Â If you planned ahead you’ll have a spare drive of the same make and model as the other drives in the NAS. Â This will help ensure that you do not run into any problems rebuilding the new drive. Â If you are buying a new drive try to stick with the same manufacturer (yes, I know you want to swear off that manufacturer, but for the sake of the other 3 drives you are better off sticking with the same manufacturer).
In order of preference:
- same exact model drive (model – same TB size, rpm speed, etc)
- same manufacturer with the same or larger capacity and RPM speed (you can go same size or larger, but never smaller) that is on the approved hard drive list (now is not the time to test an uncertified drive)
Swapping out drives:
Before you shut down the NAS to swap out drives. Â Verify which Drive is bad. Â Better to double check now then to open it up and replace the wrong drive. Â Make sure you note which HDD light was blinking on the front of the NAS and make sure it corresponds to the drive number that Storage Manager is reporting. Â The lights on the DS411j are aligned with the drive order stacking inside (drive 1 on top, drive 4 on bottom).
- Make sure you noted which drive number was bad and make sure you match it to the drive numbers inside. Â On stacked drives numbering starts at the top. Â HDD lights on front should match drives inside.
- Make sure NAS is turned off, cooled down and unplugged from the wall.
gbs
May 21, 2011
Your website is a fountain of informative information. Thank you!
Is that picture at the top with shattered pieces the deskstar? Would you buy Hitachi again?
Well.. I have read some 1 star “death star” reviews out there and am sold more than ever on a 5 year warranty 2TB Western Digital WD2002FAEX and the Synology DS411J.
I started today with a WD ShareSpace 8 TB. I quickly learned that this dud is DEAD if even one drive fails.. No swapping. What is the point of calling it a RAID?
macsynology
May 22, 2011
Over the course of time all hard drives fail. Your idea of going for the WD 5 year warranty is a good one because you’ll probably be able to cash in on it. My previous RMA experience has been fairly straight forward. Run their diagnostic utility to verify failure and get a RMA number. Send in the drive and wait 2 weeks for the replacement drive to get back to you. It was my Hitachi that failed (but it didn’t shatter like in the photo), and yes I would buy them again, except that they got bought out so I would probably look at WD or SeaGate.
If you buy Hitachi then make sure to buy a spare so that rebuilding your Synology Hybrid RAID (SHR) will go smoothly (yes, I know you can swap out different hard drives, but when users run into problems it is commonly from mismatched drives from different manufacturers).
The WD ShareSpace 8TB setup was probably setup RAID 0 (striped) to let you get all 8TB of data, but yes, if 1 drive fails you lose everything. You would need to have RAID 1 or 5 set to allow you to pull the bad drive and replace it. If you had RAID 5 already setup did the WD software tell you which drive went bad so you could replace it?
The one advantage of Synology’s Hybrid RAID (SHR) is that you can configure RAID 5, but use different hard drives (traditionally RAID 5 requires that all the drives be exactly the same -something that isn’t always possible when replacing drives).
gbs
May 22, 2011
Actually from what I read the WD ShareSpace is a sham. RAID is “supported” only in name and performance as long as none of the drives EVER fail. Owner after owner reports that when a single drive failed, WD told them to seek help from a disk data recovery firm.
Speaking of failed drives.. I have been trying to choose a drive for my Synology NAS (both DS411j, and DS411+II are in the Amazon cart mocking me..) and researching all day. I finally came across a disclaimer from WD on using “non RAID” drives in RAID enclosures.
Non RAID drives don’t have WD Time-Limited Error Recovery (TLER) — making them doomed to eventually go into a mode of trying to use more than the 7 second RAID tolerance/wait threshhold to clean up a read or write problem (don’t use a Caviar Green drive in a RAID — a warning is right on the WD support issue list). Once that eighth second of drive hesitance occurs, the RAID controller will mark the drive “off limits”. Seagate calls this feature Error Recovery Control (ERC), Hitachi and Samsung call it Command Completion Time Limit (CCTL). I can see how a RAID doesn’t want to stand arond waiting two minutes for a drive with a problem to report back..
Did you consider this when buying a drive? (Or is the Synology so smart it can work around this). Right now I am thinking about the two WD RAID models WD2002FYPS, or WD2003FYYS which cost more than twice as much (per Terabyte) than your DeskStar. I just want to do some Time Machine backups, iPhoto backups, LAN gigabit network video/audio file transfers, etc.
Thanks for you time.
macsynology
May 23, 2011
You are definitely doing your homework! The DS 411j vs DS411+II is definitely the big decision.
I originally didn’t think CPU access on the NAS would be all that. After copying tons of data over to my DS411j I noticed that it spent days blinking the HDD lights, which I later found out was CPU processing in the background making thumbnails of all my photos for mobile access (ipad scrolling of photos). You’ll probably get the same on the DS411+II, but it won’t take nearly as long with the faster CPU and more RAM.
Occasionally when I get a sluggish response in accessing the NAS (usually just spinning the drives up) I wonder if it would have been better to get the DS411+ (the +II wasn’t announced then), but then again I haven’t really run into anything to make me unhappy with the 411j.
You are definitely going with the GOLD standard of enterprise class hard drives! The only difference I can see in your 2 drive choices is that one is the green standard. While I think it is great to save power I do believe that it comes with a hit in performance and stability (just google wd green drive for a list of issues like you mentioned with the Caviar).
I’d play it safe and go with the WD-RE4 (WD2003FYYS) drives and keep your NAS in a room that doesn’t get too hot (i.e. don’t stuff it in your home entertainment center with the doors closed).
Also make sure it is the WD2003FYYS-02W0B0 and not the WD2003FYYS-01T8B0 (known heat issues above 30 degrees celsius as noted on the Synology approved drive list).
Synology does a good job on their RAID controller and handles consumer grade hard drives gracefully (with the exception of Samsung which I wouldn’t touch). In my case all of my NAS data exists locally so I wasn’t too worried about going with Enterprise class hard drives or ERC/CCTL (although Hitachi claims you can control CCTL). So far no problems, and if I did run into anything the 1 drive spare would allow me to rebuild the drive and re-examine the failed drive to see if it is fixable (something I verified works well on Synology by removing a good drive and rebuilding with the spare).
Your NAS needs are very similar to mine. I’m in the middle of Time Machine backup testing and have run into a few setup issues, but I think I’ve found the right solution that I’ll blog once I verified I can do a Time Machine restore on my Macbook.
You’ll have to let me know what you chose and how setup goes. I’ve been blogging everything after the fact so I’m sure I’ve missed a few steps here and there!
– Stephen
gbs
May 23, 2011
OK.. After 24 MORE hours of looking at every drive out there, spreadsheets, Apple Discussions, QNAP Youtube propaganda, Apple Store iApps galore, etc.. You have sold me all the way. I’m going for the DS411+II unless you can think of a reason it won’t work for something Mac related. I assume it will as compatible as your DS411J.
I am going with the DeskStar 7K3000 based on your review, other Amazon customer reviews, and this formal tech review which shows how the DeskStar handles, with aplomb, “real world” performance (iTunes up and downloading, iPhoto, simultaneous Airplay, Time Machine, etc) .
(I do think every geek considering a “budget RAID” should read this article though..)
http://en.wikipedia.org/wiki/Time-Limited_Error_Recovery
gbs
May 24, 2011
Well. you will love this..
You mentioned how much CPU time and wall clock time was spent by the Synology NAS making thumbnail icons of all your pictures..
Just 12 hours ago I was listening to a review of Synology NAS by CNET in a PodCast. First thing they mentioned on the 03/16 show was they were nuts for talking about NAS since maybe 0.1% of their audience would know what an NAS is… Second thing.. you guessed it, guy complained about how it took “CPU days” for the Synology to create photo thumbnails! Ha..
There were two episodes as far as I know. The thumbnail was discussed in the March 16 (second show). It is amazing that a search of iTunes for Synology would turn up a pair of podcasts Apple.. It just works.
Podcast: “CNET to the Rescue”
Episode 03/02 (Video) Ep. 36: iOS safety tips, the Synology mixed bag, and your questions answered
Discusses new purchase of a Synology NAS (I haven’t had a chance to watch yet)
http://itunes.apple.com/us/podcast/cnet-to-rescue-ep-36-ios-safety/id310928729?i=91794940
Episode 03/16 (Audio/Video) Don’t be a sucker and other advice
http://itunes.apple.com/us/podcast/cnet-to-the-rescue-video-sd/id310928729
http://itunes.apple.com/us/podcast/cnet-to-the-rescue-mp3/id150226053
macsynology
May 29, 2011
Very cool finds gbs! Totally laughing that he ran into CPU as his main complaint! I’m watching the vids right now, but I’m thrilled to see some CNET coverage on the Synology DS! Interesting that he went with the DS 411slim to replace his HP media smart server. The CPU issue seems a non-issue in that if he makes any requests it pauses making thumbnails to accommodate.
gbs
May 30, 2011
What I don’t get is why go to the trouble of using 2.5 inch drives. I have a WD Scorpio 1TB in my MacBook Pro 17. It works great but I paid a fortune for its exotic, bleeding edge tech. This guy buys several of them for a in-home NAS? Does he live in a 500 sq foot studio apartment? Doesn’t make sense to me. I think it was 5200 RPM as well. Got all my parts. Looking for a Big Battery UPS for cheap. Something that will run my NAS, Gigabit router, and UVerse gateway router for a long time before shutting down. My 5 year old Xantrex XPower PowerSource 400 cost under $200 and would run everything all night. No auto shutdown though.. (maybe I wouldn’t have to worry about it..)
Greg mintel
June 18, 2011
Just wanted to thank you for your webpage. As your previous poster noted, there is a wealth of information on here. Thanks for taking the time!
Ivan
November 17, 2011
Thanks for the post… I just had to replace a drive in a DS411+II and was trying to work out which drive physically was #2 (the failed one). Perhaps Synology should label them in the chassis somehow? Thanks anyway!
macsynology
April 16, 2012
Good point. I agree. The chassis and drive bays should be labeled. Anyone doing their setup should take out a sharpie and mark the drive numbers now to reduce confusion over which drive bay each blinking HDD light in front really is.
Jack
March 31, 2012
Hi – Great post and very helpful… this blog was the sole reason I purchased a synology nas. Though it was a great walk through with repair/replacing a bad hard drive. Can you show me how to add another HD. I started off with only 3 3tb drives, 2 volumes (like you for time machine purpose) but I can figure out how to add another hard drive without screwing something up. Any help would be appreciated. Many thanks!
macsynology
April 13, 2012
Thanks for the kind words. It motivates me to keep writing knowing that others are in the same boat. If the new drive is going into an empty drive bay and you want it setup as a new volume without data protection you don’t have to change anything with the other drives.
If however you want to incorporate the new drive with the current drive setup you’ll have to go thru the pain of backing up your data and reformatting all the drives as a new disk group with SHR 1 disk redundancy. You can then setup your volumes with the knowledge that if any drive fails you can simply replace it and Synology will make it painless with no data loss.
http://www.synology.com/us/support/tutorials/how_to_RAID.php#4.2
Jack
April 13, 2012
Thanks for reply! Yes, very tedious to expand the volume but that’s what I’m doing. Real easy too! Power down the DS, install the new drive & boot back up. Go to your DSM/storage manager/diskgroup/ expand he new disk group. Taking forever but exactly what I needed.
Trevor
April 28, 2012
Hi Congrats excellent blog, have referenced frequently during my Synology NAS setup. Would like to ask a kind of hard drive related question. I’ve been living away from home for a year now and have NAS set up in my temporary home but soon going back to permanent base. Would greatly appreciate any hints / tips or links to safest way of transporting the hard drives. They would end up in a case getting thrown around airport baggage systems and apart from substantial bubble wrap packing etc is there anything else that can be done prior to drives being closed down or physically to transport minimizing any potential damage. Many Thanks
macsynology
April 28, 2012
The original bare hard drive packaging has an anti static bag that will help shield the drives from electrostatic shock. The plastic/cardboard packaging and box will help keep the drive suspended inside the box from banging anything hard. Your idea of bubble wrap and keeping the drives from being tossed around is also important. Keeping the drives safe from big drops and wet liquids is important.
If you are able to bring the drives as carry on I think it would be best. Some folks do carry their NAS in a padded case, but I would only do that if I was hand carrying it. In either case make sure you do a backup before you go in case you get your drives damaged or stolen. Safe travels!
Trevor Newman
April 30, 2012
Thanks for the reply, I’m in Russia and the drives in hand luggage may be a problem for a number of reasons, so wanted to try the best shock proof way….. Thanks again.
Frank
June 20, 2012
HI there, just found this blog whilst researching my first NAS. Thanks for the excellent articles.
Do you happen to know if using Synology Hybrid would introduce a single-point-of-failure should the entire NAS fail? Meaning, would the individual drives be mountable in a single-drive external case for the purpose of data migration (assuming ability to read ext4), or are they using a unconventional partition table (like the drobo) which would require they be installed in a similar chassis?
macsynology
June 27, 2012
Good question. The volumes are standard EXT4 so the data from that drive plus some of the redundant data from the other drives will be there and accessible if put in a USB drive case and connect to a Mac/PC with the right EXT4 drivers or use Ubuntu).
Normally in a NAS it is the drives that fail and not the unit. You simply pull the bad drive, insert a new one and your data gets rebuilt. Synology has helped customers repair/replace failed NAS units where you put the drives back in a refurbished unit and everything is fine again.
Synology does allow migration of the hard drives to other Synology NAS units, but I would probably set the new NAS up with new drives and do a transfer for the sack of data safety. http://forum.synology.com/wiki/index.php/How_to_Migrate_between_Synology_Systems
guy999 (@guy999)
July 15, 2012
I know that you already have a article on ups backup, but if a drive fails and it’s rebuilding and your system is not on a ups, it’s a nightmare.
synology support was able to login and i was able to get my data back, but I have about 7TB of data and it took the better part of 8 days to move everything off of the system, they were able to get it up, but recommended I pull everything off and put everything back on.
I now have a ups as well, but if you are going to be rebuilding, do not, repeat do not let the power go off or you will be very disappointed.
macsynology
July 28, 2012
Wow – Always good to hear about pitfalls and nightmares. Glad your data was recoverable and that you now have UPS setup. “8 days and 7 TerrorBites” sounds like a great horror movie title! Thanks for sharing!
Brent
July 27, 2012
Just had one of the Seagate drives fail in my Synology DS411+II and I have to say that (knock on wood) it was one of the most painless IT systems failures I have ever experienced. I cannot imagine how it could be easier. I was not able to find my spare replacement drive, so I ordered the closest current drive available but decided to bump up from 2TB to 3TB. I opened up the case, pulled 6 screws, dropped in the new drive, buttoned up the screws, plugged it in, turned the unit on, and then went to the console. From the console I was able to go to Storage Manager–>Disk Group and click “Manage” (not Storage Manager–>Volume, as you describe in your article, btw) and followed your instructions from there. Within 1 minute my NAS was accessible again and I was able to browse files while it rebuilds the remaining drive. Amazing.
macsynology
July 28, 2012
Gotta love it when a backup plan comes together! Glad to hear you didn’t run into any issues and are back up and running.
TibiS
August 20, 2012
Hello, nice post.
I’m searching for an information about possible combination of manufacturers in RAID configuration. Let’s say both manufacturers/models of HDD are in synology compatible list, is it possible to work?
I have two 2TB hard drives but one is Samsung and the other is WD. Samsung is at 5400 rpm, WD 5900 rpm. I don’t care about speed, i don’t care if there is some small difference in MB, i’m just curios if synology will accept to build the RAID or i will get some sort of error message.
I also want to buy another 2TB WD (wich will be similar to what i already have), and make an RAID 5 configuration. And in future a want to buy more 2 x 2TB WD to finaly make the RAID “normal”.
Another question is about RAID 5: if i have 3x2TB hard drives, then the usable space will be 2X2TB and 1 spare drive… but in case of fail, ANY of those drives could be replaced? The data will be safe?
Thank you!
macsynology
October 26, 2012
I’m a bit worried about the Samsung hard drive. You can mix various hard drive types and as long as you format them SHR you should have a lot of flexibility about swapping in/out drives as needed. SHR is a RAID 5 type configuration but has more flexibility. 1 drive redundancy is all most people ever need.
Steven
December 7, 2012
Thank you very much for your blog entry! I tried to search the Synology site but this is much easier to follow and more up to date! I’m currently rebuilding my Synology raid after having one disk start to fail. Thankfully I was able to backup all of my data onto another disk before the S.M.A.R.T. status actually said ‘abnormal. Hopefully in about 24 hrs everything will be back to normal. 🙂
Jp2Symposium.Org
December 22, 2012
Do you have further posts like this particular one called,
Replacing a failed hard drive « macsynology? I actually
wish to read even far more regarding it. Thanks for your time.
Les
December 29, 2012
Hi. Have a CS407 with four drives running in two pairs as Raid1. One 2Tb (2x2Tb) which i use for Timemachine then one 1Tb (2x1Tb) that i use for music, film etc. Now one of the disc in the 1Tb Raid crashed. I have purchased two new 3Tb discs which i will use for replacing that part of my system (=1x3Tb). It’s easy to just unmount the two 1Tb discs but copying the data back from the one healthy disc over network, afterwards takes forever! Any idears on how to do this faster?
Mark Johns
January 2, 2014
Awesome how well this works, great product, and thanks for the drive layout picture, that was very useful.
tommiewise
February 20, 2014
You mentioned how much CPU time and wall clock time was spent by the Sinology NAS making thumbnail icons of all your pictures..
software upgrades
Ronnie
March 3, 2014
I’ve had a DS212j going for about 2 years now, first with a single 2.5 TB WD drive ( a friend gave me when I was first experimenting with the NAS), then later adding a 2TB WD-EARX green and reconfiguring as SHR. Today another friend (generous my friends!) gave me another 2TB WD-EARX, so I elected to swap out the 2.5TB. Just to refresh my memory I googled for info on drive replacing and found your informative blog.
Just wanted to say ‘thanks’ and also to tell any other lurkers that Synology is the way to go. I’ve recommend them to a few clients and they’re all happy bunnies. (And now they’ll read Mac OS X drives too!)
Chiel
March 21, 2014
Just wanted to say: thank you! This site really helped me fixing my 413j after a crashed Disk 1.
Manu
April 27, 2014
Hello,
Very interesting article! I have a DS413j for more than a year now and I was very happy about it until I traveled with it and one of the disc went out of the bay during the trip. Of course I did not noticed it and the disk appeared as damaged and needed to be replaced. That’s why I found your article and I am actually in the process of repairing it and I am quite worried as I can’t access any data. I hope it is because the disk that crashed was the first one (on 4) and the index (or something similar) needs to be rebuild otherwise…
If you have any experience about that it would be very much appreciated!
macsynology
April 27, 2014
Put a new drive in the slot of the drive that failed and let Synology rebuild the volume. You can then check the failed drive for errors and keep it as a spare if it turns out fine.
JT
June 19, 2014
Hi – I’m a long time reader and follower. I use this blog every time one of my HD dies to fix the issue. I am at the point where one of my spare (extra) HD is out of warranty. I am currently using 4 x 3TB Seagate Barracuda. To be honest, I have gone through about 4 failed drives with this model. So I wouldn’t recommend it… but I am invested in these. I would like to buy a new spare but would like to buy a 4tb version. Is this possible? Can I go with another manufacturer? say WD? Any help would be appreciated.
Ideally, I would like to start swapping out failed 3TB HDs (out of warranty ones) with new larger 4TB ones. I am hoping to increase my storage capacity. It’s inevitable that our HD will got out warranty. This is when you start pondering about increase it’s size.
macsynology
June 21, 2014
4TB drive upgrades will work. Make sure your Synology is up to date. Follow the steps for replacing a single drive. Wait for a rebuild of the drive. Verify. Enable smart sensor reporting. On e complete you can upgrade the next drive. Try to keep the replacements the same type from the approved list. I went from 3TB Hitatchi to 4TB on 2 of the 4 drives without issue, but it took several days for a complete rebuild and retest.
JT
July 26, 2014
Thank you!