Joinsubscribers and get a daily digest of news, geek trivia, and our feature articles. You can get back up and running without much fuss. That said, you do lose some or all of your fault tolerance until you can replace the failed hard drive.
Replacing it sooner rather than later is ideal. When a hard drive fails, Synology lets you know about it by loudly beeping at you. You can see which hard drive ended up failing by logging into DiskStation Manager and clicking the main menu button in the top-left corner. After determining which hard drive went kaput, you can remove it from the NAS enclosure. In that case, you can leave it powered on and remove and insert hard drives all day long without an issue.
If you do, just slide the new one in after removing the failed drive. Of course, until you replace the drive, your NAS will continue to give you warnings, so be prepared to put up with that. We recommend the extended test, because even though it takes longer, the results are much more accurate.
It will take a while at least several hoursso be patient. You can continue to use your NAS like normal, but you may notice decreased performance during the test.
Depending on the size of the RAID, this process could take several days, so be patient. You have to repair the original array first, and then you can change the RAID type later.
Is RAID1 "Hot swappable"?
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It only takes a minute to sign up. We have a server with three disks. One of these is showing an error at the bootup screen with the corresponding disk serial code in red.
Is it just a matter of turning the server off, replacing the disk, and turning it on then waiting for the disks to synchronize? We haven't bought the replacement disk yet. The defective one is a 1. Hitachi hard disk. Is there a way to see the RPM or in order to buy the correct one without having to turn the server off?
I have no problem in turning it off, it would just be more convenient that way. I'm assuming a missing disk won't affect the RAID 1 config settings the server will only lose its mirror disk until a replacement is put in the slot but out of curiosity I'd like to be sure. Will the RAID 1 settings be kept unchanged? Check whether your server supports hot plug - this is the easiest method: pull out the failed HDD, plug in the new one.
Without hot plug, you need to shut down the server, replace the failed disk check the IDs at this pointpower up, and possibly tell the BIOS which disk is to be mirrored where mind the IDs. You should replace the disk with a type that matches the remaining disk. Mixing different speeds is not a very good idea. If the disks are not vendor-specific you should have the exact type documented.
Additionally, the RAID software should show the exact disk types. Make sure the new disk is at least the size of the remaining one. You should only replace the disk once replacement has arrived. Depending on the actual problem, the defective drive might still provide some support for the other disk.I had a similar problem and did not know the proper procedure either or wanted to work with dell to find out.
I broke the raid array. Connected the new cable to port 1 and drive that was not in sync. Thanks for the update. The warning does look kind of bad the way I did it, but I was not too concerned because I figured on a RAID 1 break I would end up with two drives with the same image. It worked for me. But the procedure you documented seems to be better. Have to keep that in mind if I ever have to do that. I think Dell could do a better job of documenting the procedure. I am not that confident If I called Dell Support and waited the 30 minutes on hold I would get the right answer.
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Search instead for. Did you mean:. Mike Vance 1 Copper. Everything worked fine till a week ago, then the Intel Application Accelerator, Rad Edition IAARE started telling me that the drive on port 0 is no missing and that the integrity of the Raid volume is now "degraded". I did not feel like bugging Dell, as I have this aversion to wasting hours and even days trying to get ahold of and perhaps even manage to talk to ignorant technical help types. So I just purchased on the Internet an exact replacement of the type of Maxtor hard drive that had failed.
I figured "hey, so what -- I need a spare drive for the inevitable anyhow. I started searching on the Internet for tips on replacing failed Raid drives and just kept getting links to people talking about the virtues of Raid.
Even the Intel side had next to zero no real information. So I decided I would just go ahead and switch the drive myself without reading any tips. I opened the case and checked the cables. All was fine. I unplugged the old HD and swapped in the new. I did all this with the power off because I have never hot-swapped before and wanted to read about that in a context specific to my hardware -- boo hoo.
After power up the system recognized the new HD as a non-raid HD and did not add it to the current raid volume. I literally could not get pass the Bios setup; it wants me to do something. With pressing ctrl-Q upon startup I can go to the Raid configuration menu, but I think I would be a fool to destroy my raid volumne, since I would lose the data. It did not. Looking at the device manager settings, I see nothing for me to do.
Yeah, I need some help -- before the one remaining HD in my volume dies on me. By the way, I hear about "generation numbers". All forum topics Previous Topic Next Topic.A RAID system consists of two or more drives working in parallel. There are different RAID levels, each optimized for a specific situation.
These are not standardized by an industry group or standardization committee. This explains why companies sometimes come up with their own unique numbers and implementations. This article covers the following RAID levels:. The software to perform the RAID-functionality and control the drives can either be located on a separate controller card a hardware RAID controller or it can simply be a driver.
This means that those disks do not use a specific RAID level and acts as stand-alone disks. This is often done for drives that contain swap files or spooling data. In a RAID 0 system data are split up into blocks that get written across all the drives in the array.
This performance can be enhanced further by using multiple controllers, ideally one controller per disk. If you want to use RAID 0 purely to combine the storage capacity of twee drives in a single volume, consider mounting one drive in the folder path of the other drive. This is supported in Linux, OS X as well as Windows and has the advantage that a single drive failure has no impact on the data of the second disk or SSD drive.
Data are stored twice by writing them to both the data drive or set of data drives and a mirror drive or set of drives. If a drive fails, the controller uses either the data drive or the mirror drive for data recovery and continues operation.
You need at least 2 drives for a RAID 1 array. RAID-1 is ideal for mission critical storage, for instance for accounting systems. It is also suitable for small servers in which only two data drives will be used. It requires at least 3 drives but can work with up to Data blocks are striped across the drives and on one drive a parity checksum of all the block data is written. The parity data are not written to a fixed drive, they are spread across all drives, as the drawing below shows.
Using the parity data, the computer can recalculate the data of one of the other data blocks, should those data no longer be available.
That means a RAID 5 array can withstand a single drive failure without losing data or access to data. Although RAID 5 can be achieved in software, a hardware controller is recommended. Often extra cache memory is used on these controllers to improve the write performance.
RAID 5 is a good all-round system that combines efficient storage with excellent security and decent performance. It is ideal for file and application servers that have a limited number of data drives. That means it requires at least 4 drives and can withstand 2 drives dying simultaneously.
The chances that two drives break down at exactly the same moment are of course very small. However, if a drive in a RAID 5 systems dies and is replaced by a new drive, it takes hours or even more than a day to rebuild the swapped drive.
If another drive dies during that time, you still lose all of your data. RAID 6 is a good all-round system that combines efficient storage with excellent security and decent performance. It is preferable over RAID 5 in file and application servers that use many large drives for data storage.Menu Menu. Search Everywhere Threads This forum This thread.
Search titles only. Search Advanced search…. Everywhere Threads This forum This thread. Search Advanced…. Log in. Trending Search forums. What's new. New posts Latest activity. Thread starter Smoblikat Start date Jul 18, Sidebar Sidebar. Forums Hardware and Technology Memory and Storage.
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Nov 19, 5, Lets say I have two drives RAID1, one drive dies, will the computer keep going as if nothing had happened, or would it need to reboot in order to run off of the second and remaining drive? Sep 14, 3, 13 Smoblikat said:. So the OS never stops running? Feb 25, 16, 1, Yeah, it just depends on the controller, drives, and software.
Cool, thanks guys. You must log in or register to reply here.RAID 5 disk mirroring provides highly-secure data protection. You can use three hard drives of the same capacity to create a RAID 5 array. RAID 5 creates an exact copy of data on the member drives and protects data against a single drive failing. The usable capacity in RAID 5 is the size of the smallest member drive. It is particularly suitable for home or business use in saving important data. You can check the System Logs for error and warning messages regarding drive failures and disk volumes being in degraded mode.
If you have any further questions about QNAP products or solutions, contact customer service through the Service Portal. The Status LED will continuously flash red. The volume status will be in Degraded mode. You can configure your Turbo NAS to send you alert emails by configuring the alert notifications. The new drive should have at least the same capacity as the failed drive.
Install the drive into the Turbo NAS. It will beep for 1. The Status LED will alternate between flashing red and green. When the rebuilding is completed, the Status LED will be in green and the volume status will change to Ready. RAID 5 mirroring protection is now active. You can check the disk volume information in the System Logs. Important: Do not install a new drive when the system is not in degraded mode, otherwise you may encounter unexpected system failures.
Thank you for your feedback. HelloWelcome! You can start using a variety of QNAP member services. Software Store Get licenses for advanced features from our Software Store.The browser version you are using is not recommended for this site. Please consider upgrading to the latest version of your browser by clicking one of the following links. Article ID Use the following steps to move a RAID 1 volume to larger hard drives.
The procedure will not require reinstallation of the operating system and will not compromise the current information on the RAID 1 volume. Contact support.
Characters remaining: We appreciate all feedback, but cannot reply or give product support. Please do not enter contact information. If you require a response, contact support. Safari Chrome IE Firefox. Support Navigation Support. Close Window. Turn off the system and remove one of the hard drives. Replace it with one of the large hard drives. Click Rebuild to another disk. Select the newly added hard drive and click Rebuild. Allow the rebuild to complete.
RAID 1 - swapping in a drive with existing data?
Note You may see a dialog box warning you of data loss. This warning does not apply to RAID 1; you will still be able to access your data. Click Yes to confirm. Click Exit and shut off the system. Remove the original smaller hard drive from the system.