https://community.hpe.com/t5/operating-system-linux/data-corruption-on-p400-raid10-array/m-p/4746887#M43486 <!--!*#-->We had a 2 drive mirrored array on a DL385 G2 with a P400 controller. Both drives were reporting "predictive failure" and had the warning lights on. I replaced both drives sequentially while the system was running. After each rebuild the new drive also reported predictive failure. We then had a F.E. come out and replaced the disk backplane and the array controller. At boot time, the P400 BIOS reported some message about data corruption on the array and suggested a restore from backup. <BR /><BR />I'm not eager to do this since this is a production system that seems to be running fine. (Suse Linux 9.2). HP is apparently unwilling to offer any advice or assistance beyond shipping parts.<BR /><BR />Does anyone know of a method where I could insert a 3rd drive, make a filesystem copy to the 3rd drive, then use this to replace the mirrored pair ?? Then add a 2nd drive back in to end up with a mirror. How do you tell the controller to turn off the warning LED and assume the disks are good ??<BR /><BR />thanks,<BR />Don M. Tue, 01 Feb 2011 14:14:43 GMT Don M. 2011-02-01T14:14:43Z https://community.hpe.com/t5/operating-system-linux/data-corruption-on-p400-raid10-array/m-p/4746887#M43486 <!--!*#-->We had a 2 drive mirrored array on a DL385 G2 with a P400 controller. Both drives were reporting "predictive failure" and had the warning lights on. I replaced both drives sequentially while the system was running. After each rebuild the new drive also reported predictive failure. We then had a F.E. come out and replaced the disk backplane and the array controller. At boot time, the P400 BIOS reported some message about data corruption on the array and suggested a restore from backup. <BR /><BR />I'm not eager to do this since this is a production system that seems to be running fine. (Suse Linux 9.2). HP is apparently unwilling to offer any advice or assistance beyond shipping parts.<BR /><BR />Does anyone know of a method where I could insert a 3rd drive, make a filesystem copy to the 3rd drive, then use this to replace the mirrored pair ?? Then add a 2nd drive back in to end up with a mirror. How do you tell the controller to turn off the warning LED and assume the disks are good ??<BR /><BR />thanks,<BR />Don M. Tue, 01 Feb 2011 14:14:43 GMT https://community.hpe.com/t5/operating-system-linux/data-corruption-on-p400-raid10-array/m-p/4746887#M43486 Don M. 2011-02-01T14:14:43Z https://community.hpe.com/t5/operating-system-linux/data-corruption-on-p400-raid10-array/m-p/4746888#M43487 My advice:<BR /><BR />First: Backup your system or ensure backups are good and running. <BR /><BR />But questions though, how is your mirrored pair used? Do you only have one logical drive carved out of it for the OS alone and your data/apps filesystems are also on the same drive?<BR /><BR />If your apps and data are on a separate logical drive out of the same mirrored pair and on its own LVM VG - then you can do as you think. Plug in 2 drives, use ACU to create a new logical drive and do a pvmove of the filesystems over to the new drive. <BR /><BR />The OS drive unfortunately you'll have to deal with with a possible "rebuild" and restore of the OS.<BR /><BR />If after the mirror rebuild your P400 bios is still reporting issues - then press on HP for resolution of the rAID issue. It could be the drives are at an offending firmware with the P400....<BR /><BR />Good Luck.<BR /> Tue, 01 Feb 2011 14:57:40 GMT https://community.hpe.com/t5/operating-system-linux/data-corruption-on-p400-raid10-array/m-p/4746888#M43487 Alzhy 2011-02-01T14:57:40Z