At 04:38 AM 3/2/2007, O. Hartmann wrote:
The last days I tried to figure out why some of my lab's FreeBSD
boxes and also mine at home seem to be outperformed by some Linux
setups around here and I saw something interesting.
On my lab's FreeBSD 6.2/i386 box (ASUS P4P800, ICH5 with two SATA
150 ports, two SATA 300 drives attached) I copied big files (~ 5GB)
from one drive to
Something strange about your setup I would say. I just tried on a
Segate SATA drive off an ICH5 chipset (plain old P IV 2.4Ghz). Do
you have an option in your BIOS for "native mode" or compatibility
mode for the SATA controller ? If so, try toggling that to native SATA mode
[ns4]% iostat -c 1000
tty ad4 twed0 cpu
tin tout KB/t tps MB/s KB/t tps MB/s us ni sy in id
2 447 4.91 0 0.00 23.77 40 0.92 20 0 6 0 74
4 307 0.00 0 0.00 12.61 14 0.17 0 0 0 0 100
1 183 0.00 0 0.00 14.50 4 0.06 0 0 0 0 100
1 63 128.00 47 5.82 0.00 0 0.00 7 0 7 0 86
0 182 128.00 534 66.70 15.25 8 0.12 0 0 15 8 77
0 60 128.00 553 69.13 2.00 2 0.00 0 0 8 8 85
0 182 128.00 537 67.14 14.50 4 0.06 15 0 31 15 38
0 60 128.00 553 69.06 0.00 0 0.00 54 0 0 8 38
0 60 128.00 538 67.21 0.00 0 0.00 23 0 0 8 69
1 301 128.00 495 61.88 12.18 22 0.26 0 0 8 0 92
[ns4]# dd if=/dev/ad4 of=/dev/null bs=1024k
^C410+0 records in
410+0 records out
429916160 bytes transferred in 6.089321 secs (70601659 bytes/sec)
[ns4]#
[ns4]# atacontrol cap ad4
Protocol Serial ATA II
device model ST3400833NS
serial number 5NF25DTG
firmware revision 3.AEH
cylinders 16383
heads 16
sectors/track 63
lba supported 268435455 sectors
lba48 supported 781422768 sectors
dma supported
overlap not supported
Feature Support Enable Value Vendor
write cache yes yes
read ahead yes yes
Native Command Queuing (NCQ) yes - 31/0x1F
Tagged Command Queuing (TCQ) no no 31/0x1F
SMART yes yes
microcode download yes yes
security yes no
power management yes yes
advanced power management no no 65278/0xFEFE
automatic acoustic management no no 0/0x00 254/0xFE
[ns4]#
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