On 9/23/07, <b class="gmail_sendername">Jay R. Ashworth</b> <<a href="mailto:jra@baylink.com">jra@baylink.com</a>> wrote:<div><span class="gmail_quote"></span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<br>In LVM you can create new PVs and extend the LVs onto them, and then<br>expand the associated filesystems.<br><br>But most FSs can't shrink, and hey, everyone? Remember that if you<br>have ridiculously massive filesystems, a tape drive to back them up
<br>will cost you about $6k.<br></blockquote></div><br>Well, that depends... How fast you want it backed up and how many volumes <br>you're willing to deal with. It *could* be done on a SCSI-1 DAT4 library with<br>a 12 cartridge magazine pretty cheap, but it's like the old saw:
<br><br> Fast,<br> Cheap,<br> Reliable.<br><br>Pick any two.<br><br>I picked up a DLT 35/70 drive a lot cheaper than that a couple of years ago, on<br>EBay, so a DLT 320 might not be too bad by now, still, even that would take
<br>awhile for a Terabyte, depending on compression results. (Presumably, it <br>would take at least two tapes per Terabyte, even if 2:1 compression was <br>achieved.)<br><br>Even *this* believer in tape backup might be tempted to "just add more disks
<br>and mirror it".<br><br>Craig.