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Operating Systems Solaris recovery partition table from fdisk? Post 68129 by Just Ice on Thursday 31st of March 2005 08:54:04 AM
Old 03-31-2005
you may be able to get a good guess at the lost partition table if you can look at another box with an approximate build ... if not, try setting the partition table on the second drive to hold everything in the root slice ...

for future use ... get a script that prints out the partition table on both drives regularly so you have a hard copy of it ... (see ugly code; use your disk designators)
Code:
for disk in c0t0d0s2 c0t1d0s2 (...)
do
    echo "Begin ${disk}"
    prtvtoc /dev/rdsk/${disk}
    echo "End ${disk}\n\n"
done > myfile
mailx -s "disk partitions for `hostname` - `date`" my.email < myfile

to recover,
Code:
awk '/Begin ${disk}/,/End ${disk}/' myfile | egrep -v "^Begin|^End" | fmthard -s - /dev/rdsk/${disk}


Last edited by Just Ice; 04-01-2005 at 07:31 PM.. Reason: code correction
 

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FDISK(8)						      System Manager's Manual							  FDISK(8)

NAME
fdisk - partition a hard disk [IBM] SYNOPSIS
fdisk [-hm] [-sn] [file] OPTIONS
-h Number of disk heads is m -s Number of sectors per track is n EXAMPLES
fdisk /dev/hd0 # Examine disk partitions fdisk -h9 /dev/hd0 # Examine disk with 9 heads DESCRIPTION
When fdisk starts up, it reads in the partition table and displays it. It then presents a menu to allow the user to modify partitions, store the partition table on a file, or load it from a file. Partitions can be marked as MINIX, DOS or other, as well as active or not. Using fdisk is self-explanatory. However, be aware that repartitioning a disk will cause information on it to be lost. Rebooting the sys- tem immediately is mandatory after changing partition sizes and parameters. MINIX, XENIX, PC-IX, and MS-DOS all have different partition numbering schemes. Thus when using multiple systems on the same disk, be careful. Note that MINIX, unlike MS-DOS , cannot access the last sector in a partition with an odd number of sectors. The reason that odd partition sizes do not cause a problem with MS-DOS is that MS-DOS allocates disk space in units of 512-byte sectors, whereas MINIX uses 1K blocks. Fdisk has a variety of other features that can be seen by typing h. Fdisk normally knows the geometry of the device by asking the driver. You can use the -h and -s options to override the numbers found. SEE ALSO
part(8). FDISK(8)
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