Bug#436996: AHCI: unable to detect all SATA drives on G965/ICH8

[Zdenek <zdenek@skvot.ath.cx>]

Package: linux-image-2.6.18-4-amd64
Version: 2.6.18.dfsg.1-12etch2

In linux-image-2.6.18-4-amd64 4 port SATA controller (G965/ICH8) using
ahci driver is unable to detect all attached drives. Only 2 drives are
recognized (sdc, sdd):

2.6.18-4-amd64:
atlas:~# dmesg | grep scsi
scsi0 : sata_sil24
scsi1 : sata_sil24
sd 0:0:0:0: Attached scsi disk sda
sd 1:0:0:0: Attached scsi disk sdb
scsi2 : ahci
scsi3 : ahci
scsi4 : ahci
scsi5 : ahci
sd 2:0:0:0: Attached scsi disk sdc
sd 3:0:0:0: Attached scsi disk sdd

Looks like it's manufactured on Intel DG965RY as 6 port controller with
two dummy/unused sata ports which can cause in some cases alot headache
when installing etch.

In 2.6.21-2-amd64 newer ahci driver fixes this issue.

2.6.21-2-amd64:
atlas:~# dmesg | grep scsi | grep -v WDC
scsi0 : ahci
scsi1 : ahci
scsi2 : ahci
scsi3 : ahci
scsi4 : ahci
scsi5 : ahci
scsi6 : sata_sil24
sd 0:0:0:0: Attached scsi disk sda
sd 1:0:0:0: Attached scsi disk sdb
sd 4:0:0:0: Attached scsi disk sdc
sd 5:0:0:0: Attached scsi disk sdd
scsi7 : sata_sil24
sd 6:0:0:0: Attached scsi disk sde
sd 7:0:0:0: Attached scsi disk sdf
scsi8 : pata_marvell

Controller info:

00:1f.2 SATA controller [0106]: Intel Corporation 82801HB (ICH8) 4 port
SATA AHCI Controller [8086:2824] (rev 02)

00:1f.2 SATA controller: Intel Corporation 82801HB (ICH8) 4 port SATA
AHCI Controller (rev 02) (prog-if 01 [AHCI 1.0])
        Subsystem: Intel Corporation Unknown device 514d
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B-
        Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 0
        Interrupt: pin A routed to IRQ 58
        Region 0: I/O ports at 6048 [size=8]
        Region 1: I/O ports at 605c [size=4]
        Region 2: I/O ports at 6040 [size=8]
        Region 3: I/O ports at 6058 [size=4]
        Region 4: I/O ports at 6020 [size=32]
        Region 5: Memory at 90500000 (32-bit, non-prefetchable) [size=2K]
        Capabilities: [80] Message Signalled Interrupts: Mask- 64bit-
Queue=0/4 Enable+
                Address: fee00000  Data: 403a
        Capabilities: [70] Power Management version 3
                Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot+,D3cold-)
                Status: D0 PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [a8] #12 [0010]

Best Regards,
Zdenek