dumpadm question Post: 302349778

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Operating Systems Solaris dumpadm question Post 302349778 by achenle on Tuesday 1st of September 2009 07:19:16 PM

09-01-2009

Registered User

I hope you have an EFI label on that disk, or at least one with a non-standard Sun layout. Because the normal Sun partitioning scheme uses overlapping partitions where, as other have noted, slice 2 overlaps everything on the disk.

If you used slice 2 and the disk is partitioned something like this:

Code:

format> verify

Primary label contents:

Volume name = <        >
ascii name  = <DEFAULT cyl 4424 alt 2 hd 255 sec 63>
pcyl        = 4426
ncyl        = 4424
acyl        =    2
bcyl        =    0
nhead       =  255
nsect       =   63
Part      Tag    Flag     Cylinders        Size            Blocks
  0       root    wm    1047 - 4423       25.87GB    (3377/0/0) 54251505
  1       swap    wu       1 -  523        4.01GB    (523/0/0)   8401995
  2     backup    wm       0 - 4423       33.89GB    (4424/0/0) 71071560
  3 unassigned    wm     524 - 1046        4.01GB    (523/0/0)   8401995
  4 unassigned    wm       0               0         (0/0/0)           0
  5 unassigned    wm       0               0         (0/0/0)           0
  6 unassigned    wm       0               0         (0/0/0)           0
  7 unassigned    wm       0               0         (0/0/0)           0
  8       boot    wu       0 -    0        7.84MB    (1/0/0)       16065
  9 unassigned    wm       0               0         (0/0/0)           0

format>

You may have just overwritten something important.

Check your partitions before you go any further. If you're lucky, you will have just wiped out some unused swap.

achenle

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LEARN ABOUT OSF1

disklabel

disklabel(4)						     Kernel Interfaces Manual						      disklabel(4)

NAME

       disklabel - Disk pack label

SYNOPSIS

       #include <sys/disklabel.h>

DESCRIPTION

       Each disk or disk pack on a system may contain a disk label which provides detailed information about the geometry of the disk and the par-
       titions into which the disk is divided.	It should be initialized when the disk is formatted, and may be changed later with  the  disklabel
       program.   This	information is used by the system disk driver and by the bootstrap program to determine how to program the drive and where
       to find the file systems on the disk partitions.  Additional information is used by the file system in order to use  the  disk  most  effi-
       ciently	and  to locate important file system information.  The description of each partition contains an identifier for the partition type
       (standard file system, swap area, etc.).  The file system updates the in-core copy of the label if it contains incomplete information about
       the file system.

       The label is located in sector number LABELSECTOR of the drive, usually sector 0 (zero) where it may be found without any information about
       the disk geometry.  It is at an offset LABELOFFSET from the beginning of the sector, to allow room for the  initial  bootstrap.	 The  disk
       sector  containing  the	label  is normally made read-only so that it is not accidentally overwritten by pack-to-pack copies or swap opera-
       tions; the DIOCWLABEL ioctl, which is done as needed by the disklabel program, allows modification of the label sector.

       A copy of the in-core label for a disk can be obtained with the DIOCGDINFO ioctl; this works with a file descriptor for a block or  charac-
       ter  (raw)  device for any partition of the disk.  The in-core copy of the label is set by the DIOCSDINFO ioctl.  The offset of a partition
       cannot generally be changed, nor made smaller while it is open.	One exception is that any change is allowed if no label was found  on  the
       disk,  and  the	driver was able to construct only a skeletal label without partition information.  Finally, the DIOCWDINFO ioctl operation
       sets the in-core label and then updates the on-disk label; there must be an existing label on the  disk	for  this  operation  to  succeed.
       Thus,  the  initial  label for a disk or disk pack must be installed by writing to the raw disk.  All of these operations are normally done
       using the disklabel program.

RELATED INFORMATION

       Files: disktab(4)

       Commands: disklabel(8) delim off

																      disklabel(4)