PPC+Adaptec 2940UW+SEAGATE ST34520W = strasznie wolny transfer (dodatkowe info)

[Łukasz Maśko]

Zero odzewu... nikt się na tym nie zna? :-(

Po dołożeniu do parametrów sterownika verbose i extended dostałem w logach 
przy starcie takie coś:

CSI subsystem driver Revision: 1.00
ahc_pci:1:13:0: Reading SEEPROM...done.
ahc_pci:1:13:0: internal 50 cable not present, internal 68 cable is present
ahc_pci:1:13:0: external cable not present
ahc_pci:1:13:0: BIOS eeprom is present
ahc_pci:1:13:0: High byte termination Enabled
ahc_pci:1:13:0: Low byte termination Enabled
ahc_pci:1:13:0: Downloading Sequencer Program... 441 instructions downloaded
ahc_pci:1:13:0: Features 0x10005, Bugs 0x11, Flags 0x28485540
scsi0 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.3.9
        <Adaptec 2940 Ultra SCSI adapter>
        aic7880: Ultra Wide Channel A, SCSI Id=7, 16/253 SCBs

(scsi0:A:0): 3.300MB/s transfers
scsi0:A:0:0: Tagged Queuing enabled.  Depth 253
(scsi0:A:1): 3.300MB/s transfers
scsi0: Selection Timeout on A:1. 0 SCBs aborted
(scsi0:A:2): 3.300MB/s transfers
scsi0: Selection Timeout on A:2. 0 SCBs aborted
(scsi0:A:3): 3.300MB/s transfers
scsi0: Selection Timeout on A:3. 0 SCBs aborted
(scsi0:A:4): 3.300MB/s transfers
scsi0: Selection Timeout on A:4. 0 SCBs aborted
(scsi0:A:5): 3.300MB/s transfers
scsi0: Selection Timeout on A:5. 0 SCBs aborted
(scsi0:A:6): 3.300MB/s transfers
scsi0: Selection Timeout on A:6. 0 SCBs aborted
(scsi0:A:8): 3.300MB/s transfers
scsi0: Selection Timeout on A:8. 0 SCBs aborted
(scsi0:A:9): 3.300MB/s transfers
scsi0: Selection Timeout on A:9. 0 SCBs aborted
(scsi0:A:10): 3.300MB/s transfers
scsi0: Selection Timeout on A:10. 0 SCBs aborted
(scsi0:A:11): 3.300MB/s transfers
scsi0: Selection Timeout on A:11. 0 SCBs aborted
(scsi0:A:12): 3.300MB/s transfers
scsi0: Selection Timeout on A:12. 0 SCBs aborted
(scsi0:A:13): 3.300MB/s transfers
scsi0: Selection Timeout on A:13. 0 SCBs aborted
(scsi0:A:14): 3.300MB/s transfers
scsi0: Selection Timeout on A:14. 0 SCBs aborted
(scsi0:A:15): 3.300MB/s transfers
scsi0: Selection Timeout on A:15. 0 SCBs aborted
  Vendor: SEAGATE   Model: ST34520W          Rev: 1444
  Type:   Direct-Access                      ANSI SCSI revision: 02

Natomiast zawartość /proc/scsi/aic7xxx jest taka:
$ cat /proc/scsi/aic7xxx/0
Adaptec AIC7xxx driver version: 6.3.9
Adaptec 2940 Ultra SCSI adapter
aic7880: Ultra Wide Channel A, SCSI Id=7, 16/253 SCBs
Allocated SCBs: 42, SG List Length: 85

Serial EEPROM:
0x02f8 0x02f8 0x02f8 0x02f8 0x02f8 0x02f8 0x02f8 0x02f8
0x02f8 0x02f8 0x02f8 0x02f8 0x02f8 0x02f8 0x02f8 0x02f8
0x18a6 0x005f 0x2807 0x0010 0xffff 0xffff 0xffff 0xffff
0xffff 0xffff 0xffff 0xffff 0xffff 0xffff 0xffff 0x7091

Target 0 Negotiation Settings
        User: 40.000MB/s transfers (20.000MHz, offset 127, 16bit)
        Goal: 3.300MB/s transfers
        Curr: 3.300MB/s transfers
        Channel A Target 0 Lun 0 Settings
                Commands Queued 2032
                Commands Active 0
                Command Openings 253
                Max Tagged Openings 253
                Device Queue Frozen Count 0
Target 1 Negotiation Settings
        User: 40.000MB/s transfers (20.000MHz, offset 127, 16bit)
Target 2 Negotiation Settings
        User: 40.000MB/s transfers (20.000MHz, offset 127, 16bit)
Target 3 Negotiation Settings
        User: 40.000MB/s transfers (20.000MHz, offset 127, 16bit)
Target 4 Negotiation Settings
        User: 40.000MB/s transfers (20.000MHz, offset 127, 16bit)
Target 5 Negotiation Settings
        User: 40.000MB/s transfers (20.000MHz, offset 127, 16bit)
Target 6 Negotiation Settings
        User: 40.000MB/s transfers (20.000MHz, offset 127, 16bit)
Target 7 Negotiation Settings
        User: 40.000MB/s transfers (20.000MHz, offset 127, 16bit)
Target 8 Negotiation Settings
        User: 40.000MB/s transfers (20.000MHz, offset 127, 16bit)
Target 9 Negotiation Settings
        User: 40.000MB/s transfers (20.000MHz, offset 127, 16bit)
Target 10 Negotiation Settings
        User: 40.000MB/s transfers (20.000MHz, offset 127, 16bit)
Target 11 Negotiation Settings
        User: 40.000MB/s transfers (20.000MHz, offset 127, 16bit)
Target 12 Negotiation Settings
        User: 40.000MB/s transfers (20.000MHz, offset 127, 16bit)
Target 13 Negotiation Settings
        User: 40.000MB/s transfers (20.000MHz, offset 127, 16bit)
Target 14 Negotiation Settings
        User: 40.000MB/s transfers (20.000MHz, offset 127, 16bit)
Target 15 Negotiation Settings
        User: 40.000MB/s transfers (20.000MHz, offset 127, 16bit)

Wygląda to tak, jakby on sobie z góry założył dla tego dysku transfer 
3.3MB/s i tyle - ani krztyny więcej. Zupełnie tego nie rozumiem :-/
-- 
Łukasz Maśko                                          ICQ: 146553537    _o)
Lukasz.Masko(at)ipipan.waw.pl                          GG:   2441498    /\\
Registered Linux User #61028              JID: paranoid w jabberpl.org   _\_V