这里有用RAID0的吗？效果怎么样？

lejcey

# uname -a
Linux LL-Gentoo 2.6.27-gentoo-r1 #5 SMP Thu Oct 30 14:17:17 CST 2008 i686 Intel(R) Core(TM)2 Duo CPU E6550 @ 2.33GHz GenuineIntel GNU/Linux

# hdparm -tT /dev/sdb1 /dev/sdc1 /dev/md1

/dev/sdb1:
Timing cached reads:   7802 MB in  2.00 seconds = 3904.67 MB/sec
Timing buffered disk reads:  240 MB in  3.00 seconds =  79.93 MB/sec

/dev/sdc1:
Timing cached reads:   7394 MB in  2.00 seconds = 3700.42 MB/sec
Timing buffered disk reads:  172 MB in  3.03 seconds =  56.68 MB/sec

/dev/md1:
Timing cached reads:   8164 MB in  2.00 seconds = 4086.06 MB/sec
Timing buffered disk reads:  340 MB in  3.00 seconds = 113.22 MB/sec

用的 Linux 的软 RAID，/dev/md1是带压缩的 reiser4，实际使用在 emerge 的时候提升了很多。