On 4/26/2011 11:38 AM, Michael Conner wrote:
> I installed BPC a few weeks ago and have been doing testing and setup since
> then and have things working pretty well on several linux, windows, and mac
> clients (ultimately there will be about 15 clients). The server is a Dell
> 2400 with a 160gb ide drive, Centos 5.6, BPC 3.1 installed with yum from the
> testing repos. I've added a sata controller and two 2t drives as a raid 1
> setup, which is what I'll use for real backups. I can't boot off the sata
> drives, so I boot from the ide drive and put topdir on the satas.
>
> I've done some searching on offsite backups as I would like to maintain at
> least a recent copy offsite as disaster protection. DD has been too slow for
> these large drives (I would have to leave it going overnight with no backups
> running). I may go with periodic archives using the BPC archive function.
>
> However, another idea intrigued me that I saw in an earlier posting. Someone
> used a RAID 1 setup but only put in the second disk periodically, then
> removed it for offsite storage. I have three 2T drives, so was considering
> something similar where I would keep a normal 2-disk RAID 1 setup but
> periodically remove one disk and replace it with a prior offsite disk.
>
> Not being particularly experienced in all this, I was hoping someone on the
> list could offer advice on whether this was a good ideal or not and potential
> pitfalls.
It is working for me, but I use a 3-member RAID1 where 2 are always
connected and the 3rd is rotated out periodically. This isn't really
necessary but when I was first trying it with one internal, one external
drive the internal one failed, corrupting the attached external, and it
was something of a hassle to rebuild from the remaining offsite external.
But, note that even though you don't technically have to stop/unmount
the raid while doing the sync, realistically it doesn't perform well
enough to do backups at the same time. I use a cron job to start the
sync very early in the morning so it will complete before backups would
start.
--
Les Mikesell
lesmikesell AT gmail DOT com
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