On Fri, 2005-04-08 at 12:56 -0500, Gary Needham wrote:
> On Apr 7, 2005, at 3:11 PM, John C. Welch wrote:
>
> > On 4/7/05 14:11, "Jacob Bresciani" <email@hidden> wrote:
> >
> >>
> >> This is a function that should be available since corporate data is
> >> always growing. Yes backups are essential and a full backup should
> >> definitely be done before attempting to re-size a partition. The time
> >> it
> >> takes to delete and re-create the partitions, and then restore all the
> >> data can be huge. Take into consideration the XRAID, how much time
> >> would
> >> it take to restore a complete 1Tb or larger array. What if it's
> >> already
> >> partitioned and you need to make the one of the first partitions
> >> bigger?
> >> does this mean you need to delete all partitions and then recreate and
> >> restore everything. Only if it goes south during the re-size.
> >
> > Then you do it after hours or on a weekend after a good backup.
> > Restore time
> > is a function of backup methodology so the time answer is"It depends"
> >
> > Note that growing partitions only reallocates space. If that RAID's
> > full,
> > changing partition sizes, if even possible, won't do you a bit of good.
> >
> > As well, on a RAID setup, the only purpose for partitions is if you
> > need
> > exclusive access to data by machines in a way that permissions can't
> > handle.
> >
>
> Jacob mentioned corporate data. That could also require 24/7 uptime.
> It's not something Apple has delved much into yet but is one of the
> biggest advantages of a lot of the commercial UNIX disk solutions out
> there. HFS means they'll have to do it special. And I agree with him,
> the XRAID/XSAN solutions are eventually going to require this.
> --
> Gary Needham, Apple Systems Analyst
> Kearney Public Schools, Kearney, NE
> Ph 308-698-8027 FAX: 308-698-8001
>
> "Everybody thinks of changing humanity and
> nobody thinks of changing himself." --Tolstoy
One other thought. Now I'm not sure if the XRAID can do this at all but
I know the array's from IBM and Sun can plus some other "clone" vendors.
You fill up your RAID storage array and need to add more disks, i.e. go
from 4 disks in RAID5 to 7 disks in RAID5. Some modern RAID arrays can
expand the RAID array onto these new disks. after this you need to
expand the single partition to encompass this new space. You can create
a new partition but that's not always an option, i.e. large databases.
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