[parisc-linux] External SCSI Disk

[parisc-linux] External SCSI Disk

[Donald Scobbie]

I attached an external SCSI disk to my 712/80 which has the
palinux-0.9 32 bit serial distribution installed on the internal
disk:

BOOT_ADMIN> sea

Searching for potential boot device.
This may take several minutes.

To discontinue, press ESCAPE.

   Device Path              Device Type
   -----------              -----------
   scsi.6.0                 QUANTUM FIREBALL1050S
   scsi.2.0                 SEAGATE ST32151N

BOOT_ADMIN> boo

Can anyone guess what happened next? 

SCSI subsystem driver Revision: 1.00
sim700: Configuring 53c710 (SCSI-ID 7) at f0106100, IRQ 86, options 0
scsi0: Revision 0x2
Post test1, istat 01, sstat0 00, dstat 84
sim700: WARNING IRQ probe failed, (returned 0)
scsi0: Good, target data areas are dma coherent
scsi0: test 1 completed ok.
scsi0 : LASI/Simple 53c7xx
  Vendor: SEAGATE   Model: ST32151N          Rev: HP02
  Type:   Direct-Access                      ANSI SCSI revision: 02
  Vendor: QUANTUM   Model: FIREBALL1050S     Rev: 630C
  Type:   Direct-Access                      ANSI SCSI revision: 02
Detected scsi disk sda at scsi0, channel 0, id 2, lun 0
Detected scsi disk sdb at scsi0, channel 0, id 6, lun 0
SCSI device sda: 4194685 512-byte hdwr sectors (2148 MB)
Partition check:
 sda: unknown partition table
SCSI device sdb: 2051460 512-byte hdwr sectors (1050 MB)
 sdb: sdb1 sdb2 sdb3
[deleted lines]
VFS: Cannot open root device "sda3" or 08:03
Please append a correct "root=" boot option
Kernel panic: VFS: Unable to mount root fs on 08:03

The code in drivers/scsi/sd.c assigns /dev/sda to the lowest SCSI
id and works up the way. Fair enough. IIRC SCSI id's are prioritised
7->0 for narrow SCSI and 7->0, 15->8 for wide. Should device allocation
reflect this pattern? Surely it has to for hppa where the internal 
disk has id 6 preset?

Any suggestions?

Cheers

Donald

Re: [parisc-linux] External SCSI Disk

[Grant Grundler]

Donald Scobbie wrote:
> I attached an external SCSI disk to my 712/80 which has the
> palinux-0.9 32 bit serial distribution installed on the internal
> disk:
...
>    Device Path              Device Type
>    -----------              -----------
>    scsi.6.0                 QUANTUM FIREBALL1050S
>    scsi.2.0                 SEAGATE ST32151N
> 
> BOOT_ADMIN> boo

Try "bo scsi.2.0" instead?
Just using "boot" will default to whatever the primary path is.

> The code in drivers/scsi/sd.c assigns /dev/sda to the lowest SCSI
> id and works up the way. Fair enough. IIRC SCSI id's are prioritised
> 7->0 for narrow SCSI and 7->0, 15->8 for wide. Should device allocation
> reflect this pattern?

It could. Search the mail archives - I've complained about this before.

>  Surely it has to for hppa where the internal 
> disk has id 6 preset?

It doesn't. 

> Any suggestions?

Make sure your partition layout doesn't cross the 2GB boundary for
the /boot or 0xf0 partition. palo documentation has the best explanation
of the PDC limitations I know of.

In general, I'm guessing that the scsi.6.0 has palinux installed on it
and the scsi.2.0 disk isn't partitioned with a compatible format for
some reason.

grant

Grant Grundler
parisc-linux {PCI|IOMMU|SMP} hacker
+1.408.447.7253