bravob Posted March 9, 2013 Share Posted March 9, 2013 I was trying to upgrade my priority hdd from 2TB to 3TB and about 10%, one of the other data disk showing thousands of errors on the R/W. So, i try to replace the error disk with another bigger disk, and put back the original parity hdd, but UNRAID refuse to recognise the original parity hdd and indicate wrong disks. So, i power off and put back the original parity hdd and original error disk and try to run parity sync but now it get stuck with the error disk showing more errors. My question is how to i use back the original parity hdd to rebuild a new disk for the error disk replacement.... help pls !!!.... Quote Link to comment
Joe L. Posted March 9, 2013 Share Posted March 9, 2013 Sounds to me like it is too late. You've already written to the old parity disk. (making it invalid) Perhaps someone else will have an idea. Joe L. Quote Link to comment
bravob Posted March 9, 2013 Author Share Posted March 9, 2013 No hope of reusing the old parity hdd ?? Quote Link to comment
bravob Posted March 9, 2013 Author Share Posted March 9, 2013 What should i do next so that my UNRAID system will be operational again ?? Also, i have heard of using some sort of application to read any single UNRAID format disk from other computer... how do i do that Please help.... anyone ?? Is there support for UNRAID ? Quote Link to comment
Helmonder Posted March 9, 2013 Share Posted March 9, 2013 Your screenprint only shows one drive with issues: the parity drive, and it is beiing rebuild. Where do you draw the conclusion from that there is another disk failing ? In the event of double failure you loose data on both drives. In the event of double failure where the second failing drive is the parity drive you loose the data on the data drive AND parity is gone (so every failure that will come in future will immediately mean loss of data. Since you were rebuilding parity there WAS no parity and your array was running unprotected, at that point you state you removed a drive and with that action you removed the data. Without parity it cannot be reconstructed. Best option would be to put back in that second failing drive and let parity rebuild. Also double check all cabling, you just put in a new disk and after that another disk failed, chances are you rocked a cable loose and there is no real issue with the second failing drive. Unraid disks are formatted using reiserfs, and, with help of a special driver, you can attach those drive to a windows pc and read them. Quote Link to comment
bravob Posted March 9, 2013 Author Share Posted March 9, 2013 >Your screenprint only shows one drive with issues: the parity drive, and it is beiing rebuild. Where do you draw the conclusion from that there is another disk failing ? I am referring to the disk with the errors. >In the event of double failure you loose data on both drives. In the event of double failure where the second failing drive is the parity drive you loose the data on the data drive AND parity is >gone (so every failure that will come in future will immediately mean loss of data. The parity drive did not fail, i bought a new 3TB HDD so i want to upgrade the parity hdd to the bigger size so that i can upgrade the rest later. But when i was doing the upgrade using the new parity hdd, the parity building failed because that disk9 is showing many errors and rebuilding is extremely slow... speed was like in kb/s... So, i stop the progress and shutdown the system, swap back the original parity hdd and try to start up but it is showing wrong disk error and refuse to start the arrary. So i did a parity sync which is what you see in the picture. >Best option would be to put back in that second failing drive and let parity rebuild. Also double check all cabling, you just put in a new disk and after that another disk failed, chances are you >rocked a cable loose and there is no real issue with the second failing drive. That is what i am trying to do now and i have changed the data cable... >Unraid disks are formatted using reiserfs, and, with help of a special driver, you can attach those drive to a windows pc and read them. How do i obtain this software ? Quote Link to comment
bravob Posted March 9, 2013 Author Share Posted March 9, 2013 Attached syslog. unraid_syslog.txt Quote Link to comment
bravob Posted March 9, 2013 Author Share Posted March 9, 2013 Sorry for so many questions... but will i lose all data on the array If the worst case i decide to forgo the disk9 (the one with the error), can i rebuild the parity with a new 3TB hdd , then later add other new HDD ..... Quote Link to comment
Helmonder Posted March 9, 2013 Share Posted March 9, 2013 Ah... disk9... These errors do not mean you have lost data yet... At the moment there are errors that will be incorrectable then the array will give a redball on the drive. The errors however are not good. Again: recheck cabling to make sure you did not jerk loose the cable. Post a SMART report on disk9. In the meantime copy important data OFF disk9 to another array drive just in case.. Give the array rest, do not use it so it gets maximum opportunity to regenerate parity... There is a good chance this will be ok... What is happening is that the complete disk9 (and all other disks) are now beiing read to regenerate parity, this reading is generating errors. So: - copy most important data off disk9 to be sure - do not touch the array (stop plugins) - let parity sync continue - get a new disk and preclear it - replace disk9 - start using the array again Quote Link to comment
bravob Posted March 9, 2013 Author Share Posted March 9, 2013 What do you mean by copy disk9 ? I try to access my other data disk using its disk share and it is ok, but i cannot access disk9. Also, i do not have the same size of disk9, can i replace with a bigger disk ? The parity rebuilding is extremely slow.... i remembered i left it overnight the day before today and it is still at 1%.... speed showing kb/s .... Quote Link to comment
Helmonder Posted March 9, 2013 Share Posted March 9, 2013 You canno even access it ? Can you get a smart report ? Quote Link to comment
bravob Posted March 9, 2013 Author Share Posted March 9, 2013 Ok.. after few tries.. i managed to go into disk9 and enable the share (previously was not shared). I try to copy some folders and files, along the way, it gets file cannot be copy and later shared disconnected... I want to try to mount disk9 to my other system directly to check. Where can i find the right reiserfs for Windows 7 ? Quote Link to comment
mbryanr Posted March 9, 2013 Share Posted March 9, 2013 http://lime-technology.com/forum/index.php?topic=2057.msg14950#msg14950 Quote Link to comment
bravob Posted March 9, 2013 Author Share Posted March 9, 2013 Thanks... but why am i getting this error ? Quote Link to comment
Helmonder Posted March 9, 2013 Share Posted March 9, 2013 Most probably for the same reason linux cannot read it in unraid: its broken.. Quote Link to comment
bravob Posted March 10, 2013 Author Share Posted March 10, 2013 broken ? Meaning HDD gone case ? data on this hdd gone ? Quote Link to comment
garycase Posted March 10, 2013 Share Posted March 10, 2013 It seems fairly clear that disk9 has failed. So the first thing you should do is remove disk9 from the system; go into the disk assignments and remove disk9 (change that position to unassigned) and set the parity drive you want; then do a RESTORE. This will automatically generate parity -- this will take a long time, so plan on overnight and then some. Once it's done, your array will be fault-tolerant again, and you can add another drive when you get a replacement for disk9. As for the data on disk9 ... first attach disk9 to a PC using a USB bridge and see if you can read the file system on the disk. You can install the free Linux Reader driver to read the disk [http://www.diskinternals.com/linux-reader/ ]. If the disk can be read, you can probably copy most of the data from your Windows PC to the UnRAID server (after it's ready, of course -- wait for the parity generation to complete before doing this). If the data can't be read, you may get lucky and be able to read the directory => if so, you can get a list of what files were on the disk, and then just copy them from your backups. Quote Link to comment
bravob Posted March 10, 2013 Author Share Posted March 10, 2013 Actually, i am connecting the disk9 to a SATA/USB3 docking station with the USB3 connected to my computer that is trying to copy the data. In the Windows disk management, i can see disk9 but unformated so i cannot access. I will try this linux reader and see whether it can read the content. Quote Link to comment
bravob Posted March 10, 2013 Author Share Posted March 10, 2013 By the way, where can i find restore ?? There is no such option and still showing wrong disks... i have inserted a new HDD for parity... how to do a parity hdd now ?? Quote Link to comment
bravob Posted March 12, 2013 Author Share Posted March 12, 2013 Will i lose the data on my other disks using the new config ? Also, i still cannot see the content of disk9 using the linux reader. Am i using it wrongly or what ?? Quote Link to comment
Helmonder Posted March 12, 2013 Share Posted March 12, 2013 New config writes new parity disk information, the parity disk does not contain data, it contains the information needed to simulate a lost drive as long as only one disk has failed. So no; rebuilding parity does not destroy data unless you currently simulating a drive that waa lost. Quote Link to comment
Helmonder Posted March 12, 2013 Share Posted March 12, 2013 As previously stated: as long as you are sure your cables are properly connected and you cannot read the drive it most probably is broken/busted/kaput so you will not be able to read it. Specialised firms might still be able to get data off the drive but that is very expensive. Since you had no valid parity when disk9 burned out the data on that drive is lost. Remove disk9 and rebuild parity using new config. As long as you do not do that every next disk failure will mean data-loss. Quote Link to comment
bravob Posted March 12, 2013 Author Share Posted March 12, 2013 I hope i am doing this correctly... i have use the New Config and leave the disk9 empty. Quote Link to comment
bravob Posted March 12, 2013 Author Share Posted March 12, 2013 Also i again try to access the disk9 using linux reader... how do i access it ?? Quote Link to comment
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