disk-to-disk copy

2007-12-25 7:50:00

Here's a late summary for my question on "disk mirroring" ..

> Does anyone have an elegant solution to mirror a disk without the benefit of

> an 8mm tape drive? Would something like this work:

[ additional junk deleted ... ]

Two types of answers due to my failure to use the correct terminology i.e. my

question referred to disk-to-disk copying rather than actual disk mirroring:

1. Use Sun's Desk Suite software for actual mirroring. Additionally,

public domain "abcd" (Automatic Backup Copy Daemon, consult archie

for the nearest copy) can be used for making copies of files changed

on file base.

2. To copy disk-to-disk you can use two different methods.

a) # dd if=/dev/sd1a of=/dev/sd2a bs=n

( heads x cyls ) x sec/trk

where n = -------------------------- for speed's sake ...

cyls

will result into a perfect mirror copy with the boot block intact.

However, this method will only work if the disk geometries are

identical.

b) # dump 0bsdf 126 6000 54000 - /dev/rst1a | (cd /mnt; restore rvbf 126 -)

where the target partition is mounted to /mnt. This will copy the disk

even if the partitions are not identical. In order to make this

partition bootable you must install the boot block. For further info

on the boot block install refer to the man page for 'installboot'.

Also, I wanted to apologize for the bogus reply address risto%noname@sun.com and

thank the people who pointed it out for me.

Thanks to:

snowbird!asdi.saic.com!scheller (Mark Scheller x6519)

bernards@ECN.NL (Marcel Bernards)

bit!jayl@Sun.COM (Jay Lessert)

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