freebsd, adaptec aic7902, 4 or more seagate drives == resets

[Andrew Heybey]

Don Bowman <don at sandvine.com> writes:

> has anyone successfully used 4 or more seagate
> [10K or 15K] U320 drives on a single scsi
> bus with an adaptec aic7902 controller?

Yes.  Six, to be precise:

ahd0: <Adaptec AIC7902 Ultra320 SCSI adapter> port 0x4000-0x40ff,0x3800-0x38ff mem 0xfe9e0000-0xfe9e1fff irq 19 at device 7.0 on pci4
aic7902: Ultra320 Wide Channel A, SCSI Id=7, PCI-X 67-100Mhz, 512 SCBs
ahd1: <Adaptec AIC7902 Ultra320 SCSI adapter> port 0x3400-0x34ff,0x3000-0x30ff mem 0xfe9f0000-0xfe9f1fff irq 20 at device 7.1 on pci4
aic7902: Ultra320 Wide Channel B, SCSI Id=7, PCI-X 67-100Mhz, 512 SCBs
Waiting 5 seconds for SCSI devices to settle
ses0 at ahd1 bus 0 target 6 lun 0
ses0: <ESG-SHV SCA HSBP M16 0.05> Fixed Processor SCSI-2 device 
ses0: 3.300MB/s transfers
ses0: SAF-TE Compliant Device
da0 at ahd1 bus 0 target 0 lun 0
da0: <SEAGATE ST373307LC 0007> Fixed Direct Access SCSI-3 device 
da0: 320.000MB/s transfers (160.000MHz, offset 63, 16bit), Tagged Queueing Enabled
da0: 70007MB (143374744 512 byte sectors: 255H 63S/T 8924C)
da2 at ahd1 bus 0 target 2 lun 0
da2: <SEAGATE ST373307LC 0007> Fixed Direct Access SCSI-3 device 
da2: 320.000MB/s transfers (160.000MHz, offset 63, 16bit), Tagged Queueing Enabled
da2: 70007MB (143374744 512 byte sectors: 255H 63S/T 8924C)
da1 at ahd1 bus 0 target 1 lun 0
da1: <SEAGATE ST373307LC 0007> Fixed Direct Access SCSI-3 device 
da1: 320.000MB/s transfers (160.000MHz, offset 63, 16bit), Tagged Queueing Enabled
da1: 70007MB (143374744 512 byte sectors: 255H 63S/T 8924C)
da5 at ahd1 bus 0 target 5 lun 0
da5: <SEAGATE ST373307LC 0007> Fixed Direct Access SCSI-3 device 
da5: 320.000MB/s transfers (160.000MHz, offset 63, 16bit), Tagged Queueing Enabled
da5: 70007MB (143374744 512 byte sectors: 255H 63S/T 8924C)
da4 at ahd1 bus 0 target 4 lun 0
da4: <SEAGATE ST373307LC 0007> Fixed Direct Access SCSI-3 device 
da4: 320.000MB/s transfers (160.000MHz, offset 63, 16bit), Tagged Queueing Enabled
da4: 70007MB (143374744 512 byte sectors: 255H 63S/T 8924C)
da3 at ahd1 bus 0 target 3 lun 0
da3: <SEAGATE ST373307LC 0007> Fixed Direct Access SCSI-3 device 
da3: 320.000MB/s transfers (160.000MHz, offset 63, 16bit), Tagged Queueing Enabled
da3: 70007MB (143374744 512 byte sectors: 255H 63S/T 8924C)
Mounting root from ufs:/dev/da0s1a

This is an Intel SE7501WV2, running a basterdized FreeBSD 4.2 with
various backported fixes and the ahd driver from -STABLE.

It works fine, and we notice disk problems.

andrew