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 _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"