Re: unknown partition table

[Philippe Troin <phil@fifi.org>]

Sven Lankes <sl@megabit.net> writes:

> Hi!
> 
> i recently aquired an old Sun Enterprise 150 with
> one internal 2GB HDD and 12 HDDs in the Machines
> "drive bay".
> 
> I managed to get woody installed on the system
> drive and my plan was to split the remaining 12 
> 2gig drives into two raid arrays with 5 data 
> drives and one spare.
> 
> This works fine (i can create the arrays, 
> create a filesystem and put stuff onto the
> system) as long as I don't reboot the machine.
> 
> As soon as it gets rebooted, it "looses" some
> partition tables. This is what the bootlog
> shows:
> 
> esp1: target 5 [period 100ns offset 15 20.00MHz FAST-WIDE SCSI-II]
> SCSI device sde: 4194995 512-byte hdwr sectors (2148 MB)
> sde: unknown partition table
> esp1: target 8 [period 100ns offset 15 20.00MHz FAST-WIDE SCSI-II]
> SCSI device sdf: 4194995 512-byte hdwr sectors (2148 MB)
> sdf: sdf1 sdf3
> 
> And fdisk /dev/sde now tells me that "Device contains neither a valid
> DOS partition table, nor Sun, SGI or OSF disklabel" and i have to 
> reconfigure the drive in fdisk, delete the linux and swap partitions
> that the new disklabel created and create my new raid partition.
> 
> A "working" partition table looks like this:
> 
> Disk /dev/sdb (Sun disk label): 19 heads, 80 sectors, 2733 cylinders
> Units = cylinders of 1520 * 512 bytes
> 
> Device Flag    Start       End    Blocks   Id  System
> /dev/sdb1             0      2733   2077080   fd  Linux raid autodetect
> /dev/sdb3             0      2733   2077080    5  Whole disk

                       ^^^
Change that to be:

/dev/sdb1             1      2733   ???????   fd  Linux raid autodetect
/dev/sdb3             0      2733   2077080    5  Whole disk

The partition table lies in the first sector.

Phil.