December 23, 20232 yr Hi, one of the drive was failded and unmountedable. i did xfs_repair -n, it still shows same status. then i start rebuild with a new drive. However after 14hrs re-build/parity-check DIsk5 . there are 11.801.419 Writes to the Disk, but there is no data available any where. Could you plesae kindly help with that. it is realy frastrucated for me. tower-diagnostics-20231222-1436_disk5 failed.zip tower-diagnostics-20231223-2201_after_rebuild.zip
December 23, 20232 yr Community Expert According to the diagnostics you did a format of disk5 which created an empty file system (i.e. wiped its data). A format is never part of recovering a disk with its data intact and you would have got a dialog telling you this when you attempted the format.
December 23, 20232 yr Community Expert 1 minute ago, NickHuang said: Oh No...... is that mean. all data is gone...... why did you format the drive? Running xfs_repair without the -n parameter was the correct thing to do to make the drive mountable again with its data intact. Now that you have done the format, it is possible that disk recovery software such as UFS Explorer on Windows can recover the data but it is not certain.
December 23, 20232 yr Author I replaced the failed Disk 5 with a new Hard drive actually, then i format new hard drive to create the arry. so i still have : 1. failed disk 5 2. new hard drive formate and run the rebuild. Please kindly let me know what to do now. thanks
December 23, 20232 yr Author 1 hour ago, itimpi said: why did you format the drive? Running xfs_repair without the -n parameter was the correct thing to do to make the drive mountable again with its data intact. Now that you have done the format, it is possible that disk recovery software such as UFS Explorer on Windows can recover the data but it is not certain. I managed to connected the failed/unmountedable disk is Unassigned disk, run the xfs_repair -L and successful mounted. I am copying the file from that to unsigned disk to Disk 4 now. Fingercross. But is my parity rebuid failed becasue i only have 1 Parity disk? shall i get another Parity disk for this case?
December 24, 20232 yr Community Expert 4 hours ago, NickHuang said: But is my parity rebuid failed becasue i only have 1 Parity disk? shall i get another Parity disk for this case? Not sure I understand the question? I thought the rebuild worked but you made the mistake of running a format which is why you ended up with an empty drive. 1 parity disk handles 1 drive failing, whereas 2 allows for 2 failing.
December 24, 20232 yr Author 8 hours ago, itimpi said: Not sure I understand the question? I thought the rebuild worked but you made the mistake of running a format which is why you ended up with an empty drive. 1 parity disk handles 1 drive failing, whereas 2 allows for 2 failing. Here is the sequence: 1. replace uncountable drive with new drive 2.format new drive 3. add the new new drive to array disk 5 as replacement 4 start array and run parity rebuild 5. no data available after 14hr rebuild Lucky I run xfs_repair -L and mount the drive again. my biggest concern is No data shows on my disk after parity check/rebuild. Any thing related to my format activity? Did I get something wrong in my process recovery?
December 24, 20232 yr Community Expert Just now, NickHuang said: Here is the sequence: 1. replace uncountable drive with new drive 2.format new drive 3. add the new new drive to array disk 5 as replacement 4 start array and run parity rebuild 5. no data available after 14hr rebuild Lucky I run xfs_repair -L and mount the drive again. my biggest concern is No data shows on my disk after parity check/rebuild. Any thing related to my format activity? Did I get something wrong in my process recovery? you should not have done step 2) as you never do a format as part of a data recovery operation. I think you were formatting the emulated drive rather than the physical one.? This created an empty file system on the emulated drive and updated parity to reflect this. The rebuild process then rebuilt this empty file system as the rebuild process makes a physical drive match the emulated one.
December 24, 20232 yr Author 21 minutes ago, itimpi said: you should not have done step 2) as you never do a format as part of a data recovery operation. I think you were formatting the emulated drive rather than the physical one.? This created an empty file system on the emulated drive and updated parity to reflect this. The rebuild process then rebuilt this empty file system as the rebuild process makes a physical drive match the emulated one. Yeah, that make sense to me, I do select format emulated disk option under start array option....... Too be hornesty, that option is quite confusion and attempted for new user to click...... and the whole recoery process isn't quite clear at all. But i learnt my lesson in hard way. lucky not data was lost. Thank you so much for support!
December 24, 20232 yr Community Expert 1 minute ago, NickHuang said: Too be hornesty, that option is quite confusion and attempted for new user to click...... and the whole recoery process isn't quite clear at all. I agree that some improvement could be made to the presentation - even if just to point to the relevant part of the online manual.
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.