Quoting Alex Mandel (tech_...@wildintellect.com): > I don't really know either, the only time I've had to mess with RAID was > on a clunky old workstation with 3 drives and a terrible RAID BIOS.
Doesn't seem a big deal. In my case, I'll need to muck about with /sbin/fdisk for a bit, because the mirrored pair has five filesystems plus swap: linuxmafia:/etc/bind# fdisk -l /dev/sdc Disk /dev/sdc: 18.3 GB, 18351959040 bytes 255 heads, 63 sectors/track, 2231 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Disk identifier: 0x000c1659 Device Boot Start End Blocks Id System /dev/sdc1 1 2231 17920476 5 Extended /dev/sdc5 1 243 1951834+ fd Linux raid autodetect /dev/sdc6 244 425 1461883+ fd Linux raid autodetect /dev/sdc7 426 790 2931831 fd Linux raid autodetect /dev/sdc8 791 851 489951 82 Linux swap / Solaris /dev/sdc9 852 1580 5855661 fd Linux raid autodetect /dev/sdc10 1581 2231 5229126 fd Linux raid autodetect I _could_ have made all of sdb and sdc be a single "Linux raid autodetect" volume md0 and then fdisked that, but I didn't want to mirror the swap space. Given that setup decision, I'll need to power down, crack the case, yank out and replace /dev/sdb with a fresh [sic] 18GB or so SCSI drive -- if I still have any -- and make a partition table on it of the above specs. Then, apparently I'll do: raidhotadd /dev/md0 /dev/sdb5 raidhotadd /dev/md1 /dev/sdb6 raidhotadd /dev/md2 /dev/sdb7 mkswap /dev/sdb8 swapon -a raidhotadd /dev/md3 /dev/sdb9 raidhotadd /dev/md5 /dev/sdb10 (Yeah, I know, 18GB SCSI drives in 2010 are a bit silly. All I can say is, time flies. I should at least fish into the pile and see if I have a pair of spare 73 GB ones -- though that will mean re-doing the partition maps.) > Single point of failure on the power supply doesn't worry me too much > since I can live with downtime and it's seems to be a relatively > ordinary part. No, you should worry. Chief causes of HD catastrophic failure (other than simple age and wear) are misbehaving PSUs and heat stress. Putting both drives in a single external enclosure with a single PSU means they can be both taken down at once by the same misbehaving power supply or the same seized-up fan. At that point, you have just eradicated the entire point of having a RAID1 mirror pair. > It will mean more work to configure since the NAS boxes seem to have > print serve, file server, media serve all ready out of the box. Yeah, well, for present purposes I'd rather run a Linux server using simple, commodity, general-purpose components. Works for Me.[tm] _______________________________________________ vox-tech mailing list vox-tech@lists.lugod.org http://lists.lugod.org/mailman/listinfo/vox-tech
