1 |
> |
2 |
> The one thing that first pops to my head is some hdparm results I've had |
3 |
> and if maybe it's either my kernel setup or how I'm testing with hdparm... |
4 |
> |
5 |
> Anyhow.. |
6 |
> |
7 |
> Raptors on SATA (Model Number: WDC WD360GD-00FNA0) (-c3 -u1 -A1 |
8 |
> -W1 -d1 -a256 -M254 -m16 -X70 ) |
9 |
> Kernel config |
10 |
> CONFIG_SCSI_SATA_SIL=y |
11 |
> |
12 |
> There's an alternative driver, but haven't tested it... |
13 |
> |
14 |
> hdparm -tT /dev/hde |
15 |
> |
16 |
> /dev/hde: |
17 |
> Timing cached reads: 956 MB in 2.00 seconds = 477.02 MB/sec |
18 |
> Timing buffered disk reads: 116 MB in 3.03 seconds = 38.26 MB/sec |
19 |
> |
20 |
Your times for the raptor seem awfully slow. |
21 |
|
22 |
Here the SATA settings for my kernel and my hdparm times. |
23 |
|
24 |
antec ~ # grep SATA /usr/src/linux/.config |
25 |
# CONFIG_BLK_DEV_IDE_SATA is not set |
26 |
CONFIG_SCSI_SATA=y |
27 |
CONFIG_SCSI_SATA_AHCI=y |
28 |
# CONFIG_SCSI_SATA_SVW is not set |
29 |
# CONFIG_SCSI_SATA_MV is not set |
30 |
# CONFIG_SCSI_SATA_NV is not set |
31 |
# CONFIG_SCSI_SATA_QSTOR is not set |
32 |
# CONFIG_SCSI_SATA_PROMISE is not set |
33 |
# CONFIG_SCSI_SATA_SX4 is not set |
34 |
# CONFIG_SCSI_SATA_SIL is not set |
35 |
# CONFIG_SCSI_SATA_SIL24 is not set |
36 |
# CONFIG_SCSI_SATA_SIS is not set |
37 |
# CONFIG_SCSI_SATA_ULI is not set |
38 |
# CONFIG_SCSI_SATA_VIA is not set |
39 |
# CONFIG_SCSI_SATA_VITESSE is not set |
40 |
CONFIG_SCSI_SATA_INTEL_COMBINED=y |
41 |
antec ~ # hdparm -tT /dev/md0 |
42 |
|
43 |
/dev/md0: |
44 |
Timing cached reads: 2776 MB in 2.00 seconds = 1387.91 MB/sec |
45 |
Timing buffered disk reads: 398 MB in 3.00 seconds = 132.48 MB/sec |
46 |
antec ~ # |
47 |
|
48 |
Note that this is a RAID0 with two disks, so the buffered disk read time |
49 |
is double what you should expect on a normal install. |
50 |
|
51 |
Good luck. |
52 |
|
53 |
Bill Roberts |