Jan Čípa <czi...@gmail.com> writes:

> 2009/2/20 Ferenc Wagner <wf...@niif.hu>
>
>> Jan Čípa <czi...@gmail.com> writes:
>>
>>> On the first boot after installing debian-500-hppa-DVD-1.iso on HP
>>> A500 PA-RISC, booting halts on
>>> ALERT! /dev/mapper/hp--server-root does not exist. Dropping to a shell!
>>>
>>> Setup with guided LVM option, kept recommended defaults. No complaints
>>> during installation.
>>>
>>> Machine: HP A500 class, dual CPU, 2GB RAM, 34GB internal SCSI disk,
>>> external SCSI tape drive and DVD-ROM.
>>>
>>> [...]
>>> Begin: Mounting root file system ... Begin: Running /scripts/local-top ... 
>>> [17179584.784000] device-mapper: uevent: version 1.0.3
>>> [17179584.788000] device-mapper: ioctl: 4.13.0-ioctl (2007-10-18) 
>>> initialised: dm-de...@redhat.com
>>>   Volume group "hp-server" not found
>>> [...]
>>> [17179590.176000] scsi 3:0:15:0: Direct-Access     HP 36.4G MAN3367MC HP04 
>>> PQ: 0 ANSI: 2
>>> [17179590.184000]  target3:0:15: tagged command queuing enabled, command 
>>> queue depth 16.
>>> [17179590.220000]  target3:0:15: Beginning Domain Validation
>>> [17179590.244000]  target3:0:15: asynchronous
>>> [17179590.268000]  target3:0:15: wide asynchronous
>>> [17179590.284000]  target3:0:15: FAST-20 WIDE SCSI 40.0 MB/s ST (50 ns, 
>>> offset 16)
>>> [17179590.304000]  target3:0:15: Domain Validation skipping write tests
>>> [17179590.340000]  target3:0:15: Ending Domain Validation
>>> [17179590.348000] scsi 3:0:15:0: Attached scsi generic sg2 type 0
>>> [17179590.464000] Driver 'sd' needs updating - please use bus_type methods
>>> [17179590.472000] sd 3:0:15:0: [sda] 71132960 512-byte hardware sectors 
>>> (36420 MB)
>>> [17179590.504000] sd 3:0:15:0: [sda] Write Protect is off
>>> [17179590.520000] sd 3:0:15:0: [sda] Write cache: disabled, read cache: 
>>> enabled, doesn't support DPO or FUA
>>> [17179590.544000] sd 3:0:15:0: [sda] 71132960 512-byte hardware sectors 
>>> (36420 MB)
>>> [17179590.620000] sd 3:0:15:0: [sda] Write Protect is off
>>> [17179590.748000] sd 3:0:15:0: [sda] Write cache: disabled, read cache: 
>>> enabled, doesn't support DPO or FUA
>>> [17179590.772000]  sda: sda1 sda2 sda3
>>> [17179590.900000] sd 3:0:15:0: [sda] Attached SCSI disk
>>>
>>> done.
>>> Gave up waiting for root device.
>>
>> Looks like vgchange was executed before the physical volume was
>> discovered at the end of the SCSI scan.  Please issue the
>>
>> vgchange -ay
>>
>> command and exit the shell.  If the system boots up, then it's an
>> initramfs-tools bug, rather than an installer bug.
>
> you were right, vgchange helps.
> see log:
>
> (initramfs) vgchange -a y hp-server
>   6 logical volume(s) in volume group "hp-server" now active
> (initramfs) vgdisplay hp-server
> /bin/sh: vgdisplay: not found
> (initramfs) exit
> Begin: Running /scripts/local-premount ... done.
> [17179905.808000] kjournald starting.  Commit interval 5 seconds
> [17179905.812000] EXT3-fs: mounted filesystem with ordered data mode.
> Begin: Running /scripts/local-bottom ... done.
> done.
> Begin: Running /scripts/init-bottom ... done.
> INIT: version 2.86 booting
> [...]

Great.  Now you have several options to get it work without manual
intervention:

 * boot with rootdelay=6 (or more, as needed), or
 * boot with scsi_mod.scan=sync, or
 * load (and possibly unload) the scsi_wait_scan module after all SCSI
   drivers in the initramfs.

The list is ordered by complexity and "correctness", as far as I know.
-- 
Regards,
Feri.



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