hi ya ron
> [snip]
> > - tons of problems with tapes for "large amount of data"...
>
> You get what you pay for. At work, we use DLTs, and _never_
> have problems, as long as we run the cleaning tape weekly.
> Part of the reason is that DLT drives are made well, and another
> reason is that these drives have hardware ECC.
<flame suit on>
tapes are less reliable than disks...
</flame suit off>
and i dont ever wanna remove tapes... some moron always forgets
to change the tape etc... or clean the head later
> > - i prefer disks for backups... fast, easy, cheap and
> > (offline) live backups
>
> On a production box of any size, that is totally impractical.
> Tapes are, by their nature, removable, whereas, IDE disks are
> not. SCSI disks are, but a 72GB disk is _way_ expensive.
> So, on a box the size we use at work, in order to have a month
> of backups, you'd need 90 72GB SCSI disks. No fscking way!!
> 90 DLT4 tapes, on the other hand, is expensive, but affordable.
precisely why tapes are impractical ....
- but there are tons of data on existing disks ...
160GB ide disks is $150-$200 range... cheap...
- 1Terabyte of backup in one 1u chassis.. no problem...
and i do compressed backups of up to 3 or 6 months... dpeending
on diskspace they willing ot buy and user data
IDE disks are ideal for backups... its already up and running
and is live... within a few minute if one does 1:1 mirror backups...
or goes live as soon as tar uncompresses on disks ...
( no fussing on where is the tape.. and which tape...
- lost data need to be recovered and online within the hour...
- realtime transaction based data is a separate issue...
( and they have the $$$ too ..hopefully ...
c ya
alvin
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