Dnia 2010-01-27, śro o godzinie 09:41 -0500, Carlos Williams pisze: > 2010/1/27 Michał Sawicz <michal@xxxxxxxxxx>: > > 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. > > I am sorry because I think I was using the wrong terminology then. I > want to use all 4 disks to be an active member or the RAID5 /dev/md0. > I wanted to make sure the command I posted in my original post was not > going to use 3 partitions for active members of RAID5 on /dev/md0 and > use the 4th drive as a 'spare device' in case one of the three drives > fail. I don't want that. I just want 4 active / working devices for > /dev/md0. > > >> 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. > > OK. I think that answers my questions. Thanks for your help! Great. Please keep the mailing list in the loop. -- Cheers Michał (Saviq) Sawicz
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