With that configuration, when you loose a disk, you loose the computer, swap does not do any raid features itself, important sections of memory may have been on that disk. I would actually suggest creating the mirrors over all four disks for the swap, / and /boot. You'll eat more disk space, but you will recover from a failed disk no matter which disk failed. Andrew -----Original Message----- From: linux-raid-owner@vger.kernel.org [mailto:linux-raid-owner@vger.kernel.org] On Behalf Of Jeff Woods Sent: Wednesday, April 14, 2004 8:13 PM To: robin-lists@robinbowes.com Cc: linux-raid@vger.kernel.org Subject: Re: Sanity check installation scheme At 4/15/2004 12:37 AM +0100, robin-lists@robinbowes.com wrote: >Partition | sda | sdb | sdc | sdd | >----------+--------------+--------------+----------+----------+ > 1 | RAID-1 | RAID-1 | swap | swap | > | (/boot, 80M) | (/boot, 80M) | (180M) | (180M) | > +--------------+--------------+----------+----------+ > 2 | RAID-1 | RAID-1 | RAID-5 | RAID-5 | > | (/, 100M) | (/, 100M) | (~4G) | (~4G) | > +--------------+--------------+----------+----------+ > 3 | RAID-5 | RAID-5 | > | (~4G) | (~4G) | > +--------------+--------------+ > >This will give me the following partitions: > >/ 100MB, mirrored >/boot 80MB, mirrored >/usr, /var, et. All on ~12G RAID-5 array. > >Does this look feasible? Can you see any major gotchas? Any better >suggestions? How about: Partition | sda | sdb | sdc | sdd | ----------+--------------+--------------+----------+----------+ 1 | RAID-1 | RAID-1 | swap | swap | | (/boot, 80M) | (/boot, 80M) | (130M) | (130M) | +--------------+--------------+ | | 2 | swap | swap | | | | (50M) | (50M) | | | +--------------+--------------+----------+----------+ 3 | RAID-5 | RAID-5 | RAID-5 | RAID-5 | | (/, ~4G) | (/, ~4G) | (/, ~4G) | (/, ~4G) | +--------------+--------------+----------+----------+ This will give me the following partitions: /boot 80MB, mirrored /, /usr, /var, et. All on ~12G RAID-5 array. 360M swap spread across all 4 spindles Adjust the capacities to suit. Alternatively, use the other two spindles "next to" the /boot RAID-1 partitions to provide a RAID-1 or RAID-0 /tmp filesystem. However, I'd be inclined to increase the swap area and use tmpfs (which is virtual-memory based; i.e. RAM+swap) for /tmp. -- Jeff Woods <kazrak+kernel@cesmail.net> - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
