On 29/07/2013 11:39 PM, Mihamina Rakotomandimby wrote: > Hi, > > We have on an old Dell 2850 with 4 SCSI drives, where we put a > Hardware > RAID5 on 3 disks and left 1 as spare. > I dont remember exactly, but the RAID was setup in the BIOS, and when > installing CentOS6, I just saw "1 drive". > > If it was software RAID, disk failure could be seen in /proc/mdastat, > and I could simulate failure with mdadm. > > As far as it is hardware ATM, how, at least, to know the state of the > RAID array? (syncing, healthy,...) > > Thank you. Hello, If I remember correctly, this Dell model is with Perc RAID and can be used with LSI tools. Check the following links: http://pookey.co.uk/wordpress/archives/46-dell-perc-6i-and-raid-monitoring http://tools.rapidsoft.de/perc/ http://hwraid.le-vert.net/wiki/LSI Regards,