Re: What's the reasonable time to mirror a hard disk?
It's possible you might actually want a software RAID 1, which would keep
the partitions duplicated in real time, and if one fails, the file system
would still be usable. Of course the partitions are not really meant to be
mounted directly--they're meant to be treated as a single RAID unit.
Maybe that's not what you meant at all. If you really do want to dd one
partition to the other, I think it couldn't hurt to increase dd's block size
a little more. Why use a spoon when you can use a shovel?
----- Original Message -----
From: "Yuwen Dai" <daiyuwen@hotmail.com>
To: <debian-user@lists.debian.org>
Sent: Sunday, October 21, 2001 11:44 PM
Subject: What's the reasonable time to mirror a hard disk?
> Hi, All
>
> I have two identical hard disk linked with one cable. The capacity of
each
> disk is 40G. I want to have the second disk be the mirror of the first
disk
> by using this command:
>
> dd if=/dev/hda of=/dev/hdb bs=32k
>
> Nearly 2 hours passed, dd still hadn't finished. I had to press 'Ctrl-C'
to
> stop it. Is this the right way to mirror a disk? Or is there some better
> way to do this? Thanks in advance.
>
> Best regards,
> Dai Yuwen
>
>
>
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