[mythtv-users] TFW, Error: Write -- IOBOUND
GARETH GLACCUM
gareth.glaccum at btopenworld.com
Sun Jan 7 21:22:48 UTC 2007
I was watching this as I had a similar error. I was using two SATA-II (3GB)
250MB drives in a raid-0 stripe for sdb and sdc, sda is a SATA-I for the OS.
(I currently have 4 transcodes and an update running in the background so my
figures are a little lower than I would expect)
I think that for me, as this error only occurred in the first part of the
transcode, it is due to the spin-up time for my disks (the error that is).
Once the disk is in the sequential read/write part of the cycle, there were
no errors.
Gareth
For comparison:
[root at localhost ~]# hdparm -Tt /dev/sda
/dev/sda:
Timing cached reads: 3172 MB in 2.00 seconds = 1586.43 MB/sec
Timing buffered disk reads: 174 MB in 3.01 seconds = 57.76 MB/sec
[root at localhost ~]# hdparm -Tt /dev/sdb
/dev/sdb:
Timing cached reads: 2980 MB in 2.00 seconds = 1489.88 MB/sec
Timing buffered disk reads: 116 MB in 3.01 seconds = 38.58 MB/sec
[root at localhost ~]# hdparm -Tt /dev/sdc
/dev/sdc:
Timing cached reads: 2960 MB in 2.00 seconds = 1478.78 MB/sec
Timing buffered disk reads: 112 MB in 3.00 seconds = 37.31 MB/sec
----- Original Message -----
/dev/sda:
Timing cached reads: 2396 MB in 2.00 seconds = 1197.93 MB/sec
Timing buffered disk reads: 218 MB in 3.01 seconds = 72.37 MB/sec
Sherm
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