Last month I requested some help regarding dd and the steps involved in
increasing the size of a partition on a system disk (original message
included at end). As usual, Sun-Managers were extremely helpful. Many
Thang Victor Dinh
Mark S. Anderson
... and anyone I have neglected to mention.
A few good points came out of the answers:
1. dd will ONLY work on disks of the same geometry.
2. only use dd on the raw device, i.e. /dev/rdsk/...
3. many Sun-managers who responded preferred dump and restore, partition
by partition - and this turned out to be the best result since I found
my two disks were not of equal geometry.
4. many also suggested that I boot single-user from CD-ROM and work from
there - very good advice which I used.
5. recommended block sizes for dd:
... and the one I really like: 512 times (no. of sectors per track)
I'm not an experienced System Administrator, so these kind of
suggestions were extremely valuable. Thanks again,
> Dear Sun-Managers,
> I want to increase the /var partition on the system disk of a
> SPARCserver20 running Solaris 2.4. The steps I'm planning to take are
> (i) copy system disk to spare disk, (ii) boot from spare disk, (iii)
> repartition the system disk, and (iv) boot from system disk.
> I'm stuck at step one. I'd like to use dd to copy from one disk to
> another, but I can't seem to find any info on the block size I should
> be using. Does anybody know how to work this out? Also, can I use dd
> to copy from the _mounted_ system disk to an _unmounted_ disk (but
> still in the SCSI chain)?
> Many thanks in advance, and I will summarise.
> Simon Gibbons
> Technology Services Officer
> Australian Institute of Family Studies
> Melbourne, Australia
> Tel: 61-3-9214 7880
> Fax: 61-3-9214 7839
This archive was generated by hypermail 2.1.2 : Fri Sep 28 2001 - 23:11:03 CDT