The aic7xxxx driver in 2.2.15 and 2.2.16 (version 5.1.28) appears to have a
problem with drive speed detection. I upgraded to version 5.1.30, but the
problem persists. Version 5.1.21 (in kernel 2.2.14) was OK.
Details:
dual processor Pentium III (dell) with onboard AIC-7899. There is also an
ADAPTEC raid controller, which I am not using. There are two 160 Mbyte/second
drivers attached to the controller, but the driver only sees them as being
80 Mbytes/second:
aic7xxx: <Adaptec AIC-7899 Ultra 160/m SCSI host adapter> at PCI 4/5/0
aic7xxx: external SCB RAM detected, but not enabled
aic7xxx: <Adaptec AIC-7899 Ultra 160/m SCSI host adapter> at PCI 4/5/1
aic7xxx: external SCB RAM detected, but not enabled
(scsi0) <Adaptec AIC-7899 Ultra 160/m SCSI host adapter> found at PCI 4/5/0
(scsi0) Wide Channel A, SCSI ID=7, 32/255 SCBs
(scsi0) Downloading sequencer code... 392 instructions downloaded
(scsi1) <Adaptec AIC-7899 Ultra 160/m SCSI host adapter> found at PCI 4/5/1
(scsi1) Wide Channel B, SCSI ID=7, 32/255 SCBs
(scsi1) Downloading sequencer code... 392 instructions downloaded
scsi0 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 5.1.30/3.2.4
<Adaptec AIC-7899 Ultra 160/m SCSI host adapter>
scsi1 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 5.1.30/3.2.4
<Adaptec AIC-7899 Ultra 160/m SCSI host adapter>
scsi : 2 hosts.
(scsi0:0:0:0) Synchronous at 80.0 Mbyte/sec, offset 127.
Vendor: QUANTUM Model: ATLAS10K2-TY184L Rev: DA40
Type: Direct-Access ANSI SCSI revision: 03
Detected scsi disk sda at scsi0, channel 0, id 0, lun 0
(scsi0:0:1:0) Synchronous at 80.0 Mbyte/sec, offset 127.
Vendor: QUANTUM Model: ATLAS10K2-TY184L Rev: DA40
Type: Direct-Access ANSI SCSI revision: 03
Detected scsi disk sdb at scsi0, channel 0, id 1, lun 0
scsi : detected 2 SCSI disks total.
SCSI device sda: hdwr sector= 512 bytes. Sectors= 35566478 [17366 MB] [17.4 GB]
SCSI device sdb: hdwr sector= 512 bytes. Sectors= 35566478 [17366 MB] [17.4 GB]
The story from version 5.1.21 (kernel 2.2.14) is
aic7xxx: <Adaptec AIC-7899 Ultra 160/m SCSI host adapter> at PCI 5/0
aic7xxx: external SCB RAM detected, but not enabled
aic7xxx: <Adaptec AIC-7899 Ultra 160/m SCSI host adapter> at PCI 5/1
aic7xxx: external SCB RAM detected, but not enabled
(scsi0) <Adaptec AIC-7899 Ultra 160/m SCSI host adapter> found at PCI 5/0
(scsi0) Wide Channel A, SCSI ID=7, 32/255 SCBs
(scsi0) Downloading sequencer code... 385 instructions downloaded
(scsi1) <Adaptec AIC-7899 Ultra 160/m SCSI host adapter> found at PCI 5/1
(scsi1) Wide Channel B, SCSI ID=7, 32/255 SCBs
(scsi1) Downloading sequencer code... 385 instructions downloaded
scsi0 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 5.1.21/3.2.4
<Adaptec AIC-7899 Ultra 160/m SCSI host adapter>
scsi1 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 5.1.21/3.2.4
<Adaptec AIC-7899 Ultra 160/m SCSI host adapter>
scsi : 2 hosts.
(scsi0:0:0:0) Synchronous at 160.0 Mbyte/sec, offset 127.
Vendor: QUANTUM Model: ATLAS10K2-TY184L Rev: DA40
Type: Direct-Access ANSI SCSI revision: 03
Detected scsi disk sda at scsi0, channel 0, id 0, lun 0
(scsi0:0:1:0) Synchronous at 160.0 Mbyte/sec, offset 127.
Vendor: QUANTUM Model: ATLAS10K2-TY184L Rev: DA40
Type: Direct-Access ANSI SCSI revision: 03
Detected scsi disk sdb at scsi0, channel 0, id 1, lun 0
scsi : detected 2 SCSI disks total.
SCSI device sda: hdwr sector= 512 bytes. Sectors= 35566478 [17366 MB] [17.4 GB]
SCSI device sdb: hdwr sector= 512 bytes. Sectors= 35566478 [17366 MB] [17.4 GB]
I can read and write a small partition on the first drive. I haven't pushed
it very hard yet, so I have no idea if the speed glitch has affected
stability.
I also have a twin to this that is configured slightly differently. (Different
NIC and an Adaptec 3940 added.) Kernels 2.2.15 and 2.2.16 will not even boot.
Symptoms include SCSI timeouts, continuous rebooting, and freezing. I'm still
trying to narrow this one down.
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