The RAID1 partitions are to make sure: 1) The machine is able to boot even if a disk is lost (/boot). 2) The machine isn't brought down if a disk is lost (swap) I thought about a spare drive, but I don't need high availability. I'm satisfied with being able to recover my data. Andargor --- "Callahan, Tom" <CallahanT@xxxxxxxxxx> wrote: > You "should" have a designated spare for RAID-5. > > Not sure why you have 3 disks for each RAID1, RAID1 > is mirror, and unless > the third drive is a spare, it is not needed. > > Thanks, > Tom Callahan > > -----Original Message----- > From: linux-raid-owner@xxxxxxxxxxxxxxx > [mailto:linux-raid-owner@xxxxxxxxxxxxxxx]On Behalf > Of Andargor The Wise > Sent: Thursday, December 15, 2005 2:10 PM > To: linux-raid@xxxxxxxxxxxxxxx > Subject: First RAID Setup > > > I admit it. I'm a RAID virgin. > > However, after a disastrous failure of the sole > drive > I wasn't backing up, I decided to go RAID-5 under > Slack 10.2 (first time ever with RAID-5). > > The config: > > Asus P5GL-MX (ICH6) mobo w/1 GB RAM, 4 x SATA ports > P4 3.0G/1M > 3 x WD2000JS 200.0 GB SATA drives > > First, a question: the BIOS on this machine seems to > list the SATA ports as "third/fourth IDE > master/slave". Further, the documentation seems to > say > that SATA 1/2 are "master" and SATA 3/4 are "slave" > (black and red connectors, respectively). > > My understanding is that SATA drives are each on > separate buses. Is this because the BIOS offers a > P-ATA emulation mode for SATA and it makes it > "easier" > to understand for novices to show them that way? > > I ask because people have said that it is not a good > idea to have both IDE masters and slaves on the same > bus as part of a RAID-5 array. I know SATA is > different, but will using three of the SATA ports on > this mobo be OK? > > Second, after reading the excellent advice in this > list, I decided that booting from RAID-5 might not > be > a good idea. So this is what I've been thinking: > > Each disk partitioned alike: > 1 30MB > 2 8GB (to allow for memory upgrades later) > 5 rest_of_disk > > mds: > md0 raid1 sda1 sdb1 sdc1 > md1 raid1 sda2 sdb2 sdc2 > md2 raid5 sda5 sdb5 sdc5 > > md0 /boot > md1 swap > md2 / > > Does this look OK? What should the stripe and chunk > sizes be, considering I'll be going with reiserfs? > Typical usage: development machine, some DB apps > with > medium load, read-only mostly, not many writes. Very > few large files (such as multimedia). > > Or should I set up separate RAID-5's for /usr and > /var > as well? > > Lastly, can I install directly to this > configuration, > or should I install on a separate disk and move > things > into the array? > > Andargor > > > __________________________________________________ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam > protection around > http://mail.yahoo.com > - > To unsubscribe from this list: send the line > "unsubscribe linux-raid" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at > http://vger.kernel.org/majordomo-info.html > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
