02-09-2011
Quote:
Originally Posted by
jlliagre
If the disks are the same brand and model, they have the same geometry.
I still don't get what you are trying to do. Let me rephrase what I understand:
You have two servers, each one with two disks. One of the disks died and the affected server no more boots. You believe cloning either a hard disk from the other server or the other one on the same server will fix the issue. Please clarify that last point.
To keep it simple...I am using one server with two hard drive slots. I issued a simple "dd" command .... "dd if=/dev/dsk/c0t0d0s2 of=/dev/dsk/c0t1d0s2 bs=2048k" to copy the contents of my good (boot) drive to this new (backup) drive. The address listed on the "of" portion of the dd command is what my prior secondary drive used.....could that be the issue?
I am no longer getting a geometry error at this point being that I am using identical drives.... thanks for you help.
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HD(4) Linux Programmer's Manual HD(4)
NAME
hd - MFM/IDE hard disk devices
DESCRIPTION
The hd* devices are block devices to access MFM/IDE hard disk drives in raw mode. The master drive on the primary IDE controller (major
device number 3) is hda; the slave drive is hdb. The master drive of the second controller (major device number 22) is hdc and the slave
hdd.
General IDE block device names have the form hdX, or hdXP, where X is a letter denoting the physical drive, and P is a number denoting the
partition on that physical drive. The first form, hdX, is used to address the whole drive. Partition numbers are assigned in the order
the partitions are discovered, and only non-empty, non-extended partitions get a number. However, partition numbers 1-4 are given to the
four partitions described in the MBR (the `primary' partitions), regardless of whether they are unused or extended. Thus, the first logi-
cal partition will be hdX5. Both DOS-type partitioning and BSD-disklabel partitioning are supported. You can have at most 63 partitions
on an IDE disk.
For example, /dev/hda refers to all of the first IDE drive in the system; and /dev/hdb3 refers to the third DOS `primary' partition on the
second one.
They are typically created by:
mknod -m 660 /dev/hda b 3 0
mknod -m 660 /dev/hda1 b 3 1
mknod -m 660 /dev/hda2 b 3 2
...
mknod -m 660 /dev/hda8 b 3 8
mknod -m 660 /dev/hdb b 3 64
mknod -m 660 /dev/hdb1 b 3 65
mknod -m 660 /dev/hdb2 b 3 66
...
mknod -m 660 /dev/hdb8 b 3 72
chown root:disk /dev/hd*
FILES
/dev/hd*
SEE ALSO
mknod(1), chown(1), mount(8), sd(4)
Linux 1992-12-17 HD(4)