On Wed, Jul 12, 2006 at 06:28:24PM -0700, Tanniel Simonian wrote:
> I am unsure why my tape is half the speed but almost 40 gigs more than the
> others in the Amanda Wiki. My tapes are Imation Ultrium LTO 3 tapes. Maybe
> they are a little longer?
Tanniel,
Check your bus, we installed a new HBA (host bus adapter) in our
server in order to get proper performance, between scsi, lvd and
other issues you really do need to make sure you've installed the
proper supporting HW.
> Amtapetype was executred with the device /dev/st0, I do not think this
> would make a difference, or can it? Also SCSI generic support was not
> available at the time.
>
> Now that I have everything from the barcode reader working to the tapes
> labeled, I will run the tapetype again. I also have SCSI generic enabled
> and plan to run tapetype with the /dev/nst0 device.
>
> I will cut and paste the complete console message after the job is
> complete if it comes out different. I will use the same tape that I used
> to run the original tapetype too.
>
> After all, I too am wondering why I got more space but half the speed. I'd
> rather have the reverse.
>
> Tano
>
> On Wed, July 12, 2006 12:18 am, Paul Bijnens wrote:
> > On 2006-07-11 19:46, Tanniel Simonian wrote:
> >> Amanda Group
> >> I ran the amtapetype from Amanda 2.5.0p2 last night, took about 6 hours
> >> to
> >> complete the estimate:
> >>
> >> Model: Quantum Superload 3 LTO-3 16 Tape Library.
> >>
> >> define tapetype QS3LTO-3 {
> >> comment "Quantum Super Loader 3 LTO-3 16 tape library"
> >> length 448369 mbytes
> >> filemark 6403 kbytes
> >> speed 37739 kps
> >> }
> >>
> >> I ran amtapetype on /dev/st0 on a debian Testing distribution.
> >> SCSI interface VHDI 68 Pin Ultra 160 connector running on a Adaptec
> >> 39160
> >> 2 channel SCSI 160 PCI-X interface. Server DELL PE 850 Dual Core P4 3.4
> >> GHZ 4 GB RAM
> >
> > Wow. You got 440 Gbyte on a 400 Gbyte tape???
> > But your speed is about half what others got...
> >
> > Compare this to:
> >
> > http://wiki.zmanda.com/index.php/Tapetype_definitions#LTO_Ultrium_3_with_400.2F800_Gbyte_tapes
> >
> > I'm curious about the cause these significant differences!
> >
> > (Not owning an LTO3 -- just curious.)
> >
> > --
> > Paul Bijnens, xplanation Technology Services Tel +32 16 397.511
> > Technologielaan 21 bus 2, B-3001 Leuven, BELGIUM Fax +32 16 397.512
> > http://www.xplanation.com/ email: Paul.Bijnens AT xplanation DOT
> > com
> > ***********************************************************************
> > * I think I've got the hang of it now: exit, ^D, ^C, ^\, ^Z, ^Q, ^^, *
> > * F6, quit, ZZ, :q, :q!, M-Z, ^X^C, logoff, logout, close, bye, /bye, *
> > * stop, end, F3, ~., ^]c, +++ ATH, disconnect, halt, abort, hangup, *
> > * PF4, F20, ^X^X, :D::D, KJOB, F14-f-e, F8-e, kill -1 $$, shutdown, *
> > * init 0, kill -9 1, Alt-F4, Ctrl-Alt-Del, AltGr-NumLock, Stop-A, ... *
> > * ... "Are you sure?" ... YES ... Phew ... I'm out *
> > ***********************************************************************
> >
> >
>
>
---
Brian R Cuttler brian.cuttler AT wadsworth DOT org
Computer Systems Support (v) 518 486-1697
Wadsworth Center (f) 518 473-6384
NYS Department of Health Help Desk 518 473-0773
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