July 5, 201313 yr One of my 2 TB drives died today, or when I booted up it came up as "Missing" and upon reboot it wont load anymore. So I ordered a new one. My question is though, I ordered 2 4TB drives, one for the replacement and one for a new parity. Obviously I can't replace the parity first, but what happens with my process? Do I need to replace the 2TB with the 4TB, let it setup and then replace the parity? Once the parity is on 4TB do I need to re-setup the 4TB drive as well?
July 5, 201313 yr You need to CAREFULLY read the Wiki section on "swap-disable". What you're going to do is replace the failed drive with the old parity drive and replace the parity drive with a new 4TB drive at the same time. AFTER that finishes (obviously MANY hours), then you can add your other 4TB drive to the array. These are the instructions from the Wiki: For swap-disable, you use your existing parity disk to replace the failed disk, and you install your new big disk as the parity disk: 1. Stop the array. 2. Power down the unit. 3. Replace the parity hard disk with a new bigger one. 4. Replace the failed hard disk with you old parity disk. 5. Power up the unit. 6. Start the array. When you start the array, the system will first copy the parity information to the new parity disk, and then reconstruct the contents of the failed disk. [Copied from here: http://lime-technology.com/wiki/index.php/UnRAID_Manual#Replace_a_failed_disk ]
July 5, 201313 yr Author You need to CAREFULLY read the Wiki section on "swap-disable". What you're going to do is replace the failed drive with the old parity drive and replace the parity drive with a new 4TB drive at the same time. AFTER that finishes (obviously MANY hours), then you can add your other 4TB drive to the array. These are the instructions from the Wiki: For swap-disable, you use your existing parity disk to replace the failed disk, and you install your new big disk as the parity disk: 1. Stop the array. 2. Power down the unit. 3. Replace the parity hard disk with a new bigger one. 4. Replace the failed hard disk with you old parity disk. 5. Power up the unit. 6. Start the array. When you start the array, the system will first copy the parity information to the new parity disk, and then reconstruct the contents of the failed disk. [Copied from here: http://lime-technology.com/wiki/index.php/UnRAID_Manual#Replace_a_failed_disk ] Thank you, hopefully I don't mess this up I justr bought two of these, hope they are decent. http://www.bhphotovideo.com/c/product/835055-REG/Hitachi_0S03359_4TB_Internal_Hard_Drive.html
July 5, 201313 yr They're fine ... but you simply can't install the 2nd one until you get the bad drive resolved.
July 7, 201312 yr Author just want to make sure on this, my unRAID server went back online with the invalid drive (assumingly my parity drive took over). Does this A. mean I have no parity now (obviously), but does this mean I can't do the above anymore? B. Does this not affect my plans to do the above, which is replace my parity with a 4TB, and move the parity into the spot of the dead drive?
July 7, 201312 yr just want to make sure on this, my unRAID server went back online with the invalid drive (assumingly my parity drive took over). Does this A. mean I have no parity now (obviously), but does this mean I can't do the above anymore? B. Does this not affect my plans to do the above, which is replace my parity with a 4TB, and move the parity into the spot of the dead drive? I'm not sure what you're saying here. Post a picture of the Web GUI [Alt-PrtScrn, then paste it in Paint, then save it as a JPEG, and then attach it to a post here]. The array SHOULD go online with no problem, even with a failed disk ... but parity should still be valid, and the failed disk should have a "red ball" next to it. If that's the case, then you should definitely do the swap-disable process as soon as possible, as you're running "at risk" until that's done. [A better approach would be to replace the failed drive with a 2TB drive, so you don't have to simultaneously replace the parity drive; but that would require buying another drive.]
July 9, 201312 yr Author I'm not sure what you're saying here. Post a picture of the Web GUI [Alt-PrtScrn, then paste it in Paint, then save it as a JPEG, and then attach it to a post here]. The array SHOULD go online with no problem, even with a failed disk ... but parity should still be valid, and the failed disk should have a "red ball" next to it. If that's the case, then you should definitely do the swap-disable process as soon as possible, as you're running "at risk" until that's done. [A better approach would be to replace the failed drive with a 2TB drive, so you don't have to simultaneously replace the parity drive; but that would require buying another drive.] I attached a picture, I plan to do the "Swap both" as I don't want to purchase another drive at the moment. That being said, I haven't done this for about a year now, how do I pre-clear these drives prior to unRAID just detecting them? Can I do that? Do I need to do that? I assume pre-clearing 2 4TB drives will take 4-5 days...
July 9, 201312 yr A. mean I have no parity now (obviously), but does this mean I can't do the above anymore? B. Does this not affect my plans to do the above, which is replace my parity with a 4TB, and move the parity into the spot of the dead drive? Actually you have good parity, which is WHY you can still access the missing drive (it's emulated by the other drives) and why you can rebuild the drive by simply replacing it. You can do the swap-disable process ... but do NOT wait on this. ANY other failure and you'll not be able to recover the data from the failed drive.
July 9, 201312 yr Author A. mean I have no parity now (obviously), but does this mean I can't do the above anymore? B. Does this not affect my plans to do the above, which is replace my parity with a 4TB, and move the parity into the spot of the dead drive? Actually you have good parity, which is WHY you can still access the missing drive (it's emulated by the other drives) and why you can rebuild the drive by simply replacing it. You can do the swap-disable process ... but do NOT wait on this. ANY other failure and you'll not be able to recover the data from the failed drive. drives are coming in today. I need to pre-clear first though, which will probably take like 6 weeks ...
July 9, 201312 yr You can pre-clear both drives at once if you have available SATA ports ... and they don't interfere with the array at all. But you need to either do it from the console, or via Screen => you CAN do it from Telnet sessions (2 sessions to start 2 pre-clears) .. BUT if you do that, the Telnet sessions have to remain open for the entire pre-clear. I always do it from a console on the actual UnRAID PC. You're right that a pre-clear of a 4TB drive will take a LONG time ... especially if you do multiple cycles. Given that you NEED to get your drive rebuilt, I'd not do more than 2 cycles, so you can at least get the rebuild done later this week
July 10, 201312 yr Author You can pre-clear both drives at once if you have available SATA ports ... and they don't interfere with the array at all. But you need to either do it from the console, or via Screen => you CAN do it from Telnet sessions (2 sessions to start 2 pre-clears) .. BUT if you do that, the Telnet sessions have to remain open for the entire pre-clear. I always do it from a console on the actual UnRAID PC. You're right that a pre-clear of a 4TB drive will take a LONG time ... especially if you do multiple cycles. Given that you NEED to get your drive rebuilt, I'd not do more than 2 cycles, so you can at least get the rebuild done later this week Anyone know if this is ok? Pre-Clear unRAID Disk /dev/sdf ################################################################## 1.13 Device Model: Hitachi HDS5C4040ALE630 Serial Number: PL1321LAGA673H Firmware Version: MPAOA3B0 User Capacity: 4,000,787,030,016 bytes Disk /dev/sdf: 4000.8 GB, 4000787030016 bytes 255 heads, 63 sectors/track, 486401 cylinders, total 7814037168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00000000 Disk /dev/sdf doesn't contain a valid partition table ######################################################################## invoked as ./preclear_disk.sh /dev/sdf ######################################################################## (MBR 4k-aligned set. Partition will start on sector 64) Are you absolutely sure you want to clear this drive? (Answer Yes to continue. Capital 'Y', lower case 'es'): when trying to pre clear?
July 10, 201312 yr Yes, it's just a new drive without a current partition table ... and is asking you to confirm that you want to pre-clear it.
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