i have a problem with IBM x3650 M3 raid 50 with 16 sas 146gb disks. Before christmas one of them started to lit yellow, but the machine wasworking (running esx). I have oredered a new one, but before i managed to replace it another one died, and the esx does not boot any more. Now i am not sure if the system will be able to rebuild the drive. The drive is divided into two spans, and both damaged disks are from the same span. Can anyone advise me what steps should i perform now before repleacing the disks?
If both failed disks are from the same span you are screwed, as it means a dual failure in a RAID5 subarray.
If you don't have/can't restore from backups and the failed disks are not completely broken, the only thing you can do before contacting a data recovery firm is to order two new SAS drives and use
testdisk to recover as much data as possible from the failed devices. If they went bad only due to some bad sectors, and you are very lucky, maybe you can revive the entire array.
If all else fails, you must contact a professional data recovery service.