Date: Wed, 05 Mar 2008 13:54:14 -0800 From: Dane Miller <dane@greatschools.net> To: freebsd-questions@freebsd.org Subject: sata slave on intel ICH7 Message-ID: <1204754054.13794.34.camel@danedesk.greatschools.net>
next in thread | raw e-mail | index | archive | help
Hi,
FreeBSD 6.3-RELEASE detects one of my three SATA disks as "ata2-slave".
I thought SATA did away with the master/slave ugliness of PATA.
Thinking maybe this was misleading output from FreeBSD, I did some
concurrent writes using dd. Sure enough, I see poor performance on
concurrent writes to ad4 and ad5 (ata2-master and ata2-slave), while I
see good performance on concurrent writes to ad4 and ad6 (ata2-master,
ata3-master). I can provide more details on the write tests I
performed, but I'm more interested in *why* FreeBSD detects one of my
SATA disks as a slave...
Here are some details:
6.3-RELEASE FreeBSD 6.3-RELEASE #0 i386
Motherboard: Intel S3000AH
BIOS: SATA Mode is set to "Enhanced" (as opposed to "Legacy")
# atacontrol list
ATA channel 0:
Master: no device present
Slave: no device present
ATA channel 1:
Master: no device present
Slave: no device present
ATA channel 2:
Master: ad4 <WDC WD2500KS-00MJB0/02.01C03> Serial ATA II
Slave: ad5 <WDC WD2500KS-00MJB0/02.01C03> Serial ATA II
ATA channel 3:
Master: ad6 <WDC WD2500KS-00MJB0/02.01C03> Serial ATA II
Slave: no device present
# grep -i ata /var/run/dmesg.boot
atapci0: <Intel ICH7 UDMA100 controller> port
0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0x30b0-0x30bf irq 18 at device 31.1
on pci0
ata0: <ATA channel 0> on atapci0
ata1: <ATA channel 1> on atapci0
atapci1: <Intel ICH7 SATA300 controller> port
0x30c8-0x30cf,0x30e4-0x30e7,0x30c0-0x30c7,0x30e0-0x30e3,0x30a0-0x30af
mem 0x88200000-0x882003ff irq 19 at device 31.2 on pci0
ata2: <ATA channel 0> on atapci1
ata3: <ATA channel 1> on atapci1
ad4: 238475MB <WDC WD2500KS-00MJB0 02.01C03> at ata2-master SATA150
ad5: 238475MB <WDC WD2500KS-00MJB0 02.01C03> at ata2-slave SATA150
ad6: 238475MB <WDC WD2500KS-00MJB0 02.01C03> at ata3-master SATA150
Any guidance on this would be greatly appreciated. Thanks,
Dane
--
Dane Miller
Systems Administrator
Greatschools, Inc
http://www.greatschools.net
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?1204754054.13794.34.camel>