Dnia 2010-01-27, śro o godzinie 09:26 -0500, Carlos Williams pisze: > I am building a Linux system which has 4 identical 'fd' partitions on > each of the 4 drives. I don't want to use the 4th partition or disk if > you would like to call it as a 'hot spare'. I would like to span the > entire array over the 4 drives. My question is does my command look > correct for doing so? I'm not sure I understand what you want to achieve. A 'spare' disk is one that isn't used until any of the other fail, then the spare replaces the failed one. The term 'hot spare' is used to identify a disk that is a mirror of one of the other drives, but there's no support for that in Linux Software-RAID. > mdadm --create /dev/md0 --level=5 --raid-devices=4 /dev/sda2 /dev/sdb2 > /dev/sdc2 /dev/sdd2 This will create a RAID5 array of 4 devices, yes. Capacity will be 3 x sd?2. Failure of any one of those disks will not harm the data. -- Cheers Michał (Saviq) Sawicz
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