Case is a company that introduces today appear a server hard disk hard disk drops cause data loss caused by bad case, the following brief introduction of basic configuration and server failure situation,
The need for data recovery server for some brand model 6100 server, using 16 disk of raid5 disk array, server within a single disk has a capacity of 600 gb, hard disk interface for the SAS interface,
Missing data is mainly for the virtual machine file, mainly contains four volumes of data, each about the size of the volume of about 1.5 TB,
Lead to loss of data because of a disk array has 2 disk offline, upper application server crash, after data recovery center engineer testing confirmed dropped two pieces of hard disk physical bad way,
hard disk hardware physical examination process
Engineers from 16 disk to the customer the physical tests, confirmed the customer's 2 piece dropped there are plentiful physical hard disk bad, SMART error redundancy level has been more than a threshold,
Of the two pieces of hard disk data recovery engineer physical repair, mirror out of data, at the same time also will be a normal hard disk images,
analysis disk drops order
Collect log server storage, analyze the persistence log, to confirm order 2 disk drops, dropped after using hard disk data recovery,
data recovery
Data recovery engineer will all 16 disk image data to carry on the virtual reorganization, according to certain hard disk sequence and the size of the stripe, ultimately successful virtual reorganization of a group of the same with the original server raid5 disk array,
Lun data extracted
Raid5 array of virtual disk after the success of the restructuring, the server data recovery engineer will raid disk array of 4 luns extraction, according to the underlying structure for further analysis, the file system across lun combination, successful restructuring the original data and export a raid array,
validation data is normal
To validate the exported data, confirm the exported data is normal, intact, available, verified, complete the exported data are available,
data recovery success
Engineers will restore the files from data recovery copy to come out on a dedicated server, use safe way of data transmission is handed over to the customer, after customer detailed verification, confirm all data recovery succeed,