Returns the following for each drive.
Code:
/dev/sda:
Timing cached reads: 1328 MB in 2.00 seconds = 663.82 MB/sec
Timing buffered disk reads: 56 MB in 3.07 seconds = 18.25 MB/sec
/dev/sdb:
Timing cached reads: 1380 MB in 2.00 seconds = 689.88 MB/sec
Timing buffered disk reads: 256 MB in 3.01 seconds = 85.12 MB/sec
/dev/sdc:
Timing cached reads: 1356 MB in 2.00 seconds = 678.17 MB/sec
Timing buffered disk reads: 270 MB in 3.02 seconds = 89.53 MB/sec
/dev/sdd:
Timing cached reads: 1372 MB in 2.00 seconds = 686.11 MB/sec
Timing buffered disk reads: 196 MB in 3.01 seconds = 65.22 MB/sec
/dev/sde:
Timing cached reads: 1366 MB in 2.00 seconds = 682.58 MB/sec
Timing buffered disk reads: 230 MB in 3.00 seconds = 76.64 MB/sec
/dev/sda has the OS and is an old IDE laptop drive (slow). The rest are in the array and are SATA.
Doing the same command for the RAID devices returns:
Code:
/dev/md0:
Timing cached reads: 1380 MB in 2.00 seconds = 689.58 MB/sec
Timing buffered disk reads: 196 MB in 3.01 seconds = 65.07 MB/sec
/dev/md1:
Timing cached reads: 1366 MB in 2.00 seconds = 682.90 MB/sec
Timing buffered disk reads: 316 MB in 3.00 seconds = 105.31 MB/sec
/dev/md0 is the JBOD over sdb and sdc, and /dev/md1 is md0 with sdd and sde in the RAID 5 configuration.
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