Eric at on 22 Feb 2013 17:42:13 -0800

[Date Prev] [Date Next] [Thread Prev] [Thread Next] [Date Index] [Thread Index]

Re: [PLUG] Solaris backup/restore

Hash: SHA1

On 02/22/2013 04:34 PM, Rich Freeman wrote:
> On Fri, Feb 22, 2013 at 2:20 PM, Eric Lucas <> wrote:
>> dd looks like it might stand for double disaster if the server uses zfs
> I'd be interested in elaboration here.  I'd consider dd highly inefficient, but as long as you get all the devices involved you can't go wrong with a complete bit-image of a device (assuming you restore to a device of the same size/geometry/etc).
> Of course, using a more appropriate tool to the filesystem is going to be better all-around.
> Rich

I am unable to elaborate other than to say that I think it has to do with
the nature of zfs which is not a filesystem per se, but more like a
combination of a file system and a logical volume manager.

That's just speculation on my part.  I'm a 'hack' sys admin in Linux -
mostly learned out of self-defense.  Looking at the Solaris documents
leads me quickly into the "tall weeds" of system admin where I'm truly
lost.  I *think* that's how it works.

Another example: you run something called a miniroot in Solaris - apparently
by booting from the install CD.  Curiously, you have to patch it to get
it to use an Ethernet or DVD/CD device.  NOW I really know why Linux
kicks ass.

Knoppix for Solaris... where are you?


Aside: I found out the system in question uses UFS, not ZFS.  What does
that mean?  I have no idea.  But soon I will!

- -- 
#  Eric Lucas
#                "Oh, I have slipped the surly bond of earth
#                 And danced the skies on laughter-silvered wings...
#                                        -- John Gillespie Magee Jr
Version: GnuPG v1.4.11 (GNU/Linux)
Comment: Using GnuPG with Thunderbird -

Philadelphia Linux Users Group         --
Announcements -
General Discussion  --