Lars Tunkrans wrote:
> Anyone tried to use ZFS  with this type of box  ? . The new thing about this 
> one is that 
>    it contains a    1x eSATA  to 4x SATA Port multipler 
>
>
> http://www.stardom.com.tw/sohotank%20st5610-4s-sb2.htm
>   

There won't be a ZFS issue; ZFS talks to any kind of Solaris block 
device, right?  The question is, will Solaris handle this concept, and 
this particular implementation.

I'm interested in the same question.  I'm looking at what to use for 
backup from my Solaris file server.  I've had rather bad experiences 
with external Firewire and USB disks, especially in performance (can't 
be absolutely sure the problem isn't with Windows there, though, or even 
the specific backup software).  So I'm wondering if using the eSATA port 
to connect to an external enclosure with multiple drives in it might be 
a winning strategy.  Two external enclosures, alternate monthly for a 
full backup, say.  I'm tempted to use ZFS on a random selection of disks 
with no redundancy, as a way to keep costs down. This does of course 
multiply the chance of a drive going bad and invalidating a big chunk of 
the backup just when it hurts most.

I've also considered buying two Drobos for this, but as a USB device I 
think of it as painfully slow.  But it would let me stick my spare 
drives into it in random combinations and give me redundant protection 
on my backups.  If I were using a single drive, I'd accept the risk of 
it failing, but when I'm using three or four drives, I'm not so sanguine 
about it.  I could buy two 750GB external drives and just back up to 
those, for a while longer (and then presumably move those drives into 
the server, and get something even bigger for the backup drives; but in 
the long run I don't think it's smart for me to count on always using a 
single drive for each backup).

Tape drives and tapes seem to be just too expensive.  Am I out of date 
here?  What would I need to buy to back up a system that currently has 
about 600GB of data in it, growing a few GB a month on average?  
(Digital photos; not as bad as if I were recording HD video, but still 
pretty bad at about 9MB a shot for the camera originals).

Also, what *software* does one use?  For a full, and for an 
incremental?  One obvious idea is to just cp -a to the drive for a full 
backup.  This leaves each file easily findable and individually 
accessible, which is good.  ZFS can give me a view equivalent to an 
incremental, can't it?  Which I could then copy somewhere suitable?

-- 
David Dyer-Bennet, [EMAIL PROTECTED]; http://dd-b.net/
Snapshots: http://dd-b.net/dd-b/SnapshotAlbum/data/
Photos: http://dd-b.net/photography/gallery/
Dragaera: http://dragaera.info

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