12-03-2007
Did you create any of those volumes on slice 2? If so, you've probably overwritten the boot section of the disk.
What I was trying to get at in the earlier posts was that slice 2 is the entire disk, if you run newfs over this, you will slightly break all the slices (aka partitions) on the entire disk. If you then mount that volume and start putting data on it etc, you will do more and more damage until it is no longer bootable.
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cmdk(7D) Devices cmdk(7D)
NAME
cmdk - common disk driver
SYNOPSIS
cmdk@target, lun : [ partition | slice ]
DESCRIPTION
The cmdk device driver is a common interface to various disk devices. The driver supports magnetic fixed disks and magnetic removable
disks.
The block-files access the disk using the system's normal buffering mechanism and are read and written without regard to physical disk
records. There is also a "raw" interface that provides for direct transmission between the disk and the user's read or write buffer. A sin-
gle read or write call usually results in one I/O operation; raw I/O is therefore considerably more efficient when many bytes are transmit-
ted. The names of the block files are found in /dev/dsk; the names of the raw files are found in /dev/rdsk.
I/O requests to the magnetic disk must have an offset and transfer length that is a multiple of 512 bytes or the driver returns an EINVAL
error.
Slice 0 is normally used for the root file system on a disk, slice 1 as a paging area (for example, swap), and slice 2 for backing up the
entire fdisk partition for Solaris software. Other slices may be used for usr file systems or system reserved area.
Fdisk partition 0 is to access the entire disk and is generally used by the fdisk(1M) program.
FILES
/dev/dsk/cndn[s|p]n block device (IDE)
/dev/rdsk/cndn[s|p]n raw device (IDE)
where:
cn controller n
dn lun n (0-7)
sn UNIX system slice n (0-15)
pn fdisk partition(0)
/kernel/drv/cmdk 32-bit kernel module.
/kernel/drv/amd64/cmdk 64-bit kernel module.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Architecture |x86 |
+-----------------------------+-----------------------------+
SEE ALSO
fdisk(1M), mount(1M), lseek(2), read(2), write(2), readdir(3C), scsi(4), vfstab(4), attributes(5), dkio(7I)
SunOS 5.10 9 Oct 2004 cmdk(7D)