Re: How much room is left on my LTO3 tape?

[Buck <kc2hiz@xxxxxxxxx>]

Half inch 9 track open reel.  I think the drive was a 3410.  Had a
translucent rolltop cover.  System/3.

Although, if you need any of your Doobie Brothers albums dubbed onto 8
track, I have the gear to do it.

Apparently the silent consensus is that I shouldn't worry about how many
save sets I can squeeze onto a given cartridge.  Personally I'm inclined
to agree with this but management isn't looking to find ways to increase
the operating budget just now!
  --buck


On 10/6/2011 8:34 AM, Chuck Lewis wrote:
> "In Ye Days of Yore" was that an 8 track?
>
> Chuck
>
> -----Original Message-----
> From: midrange-l-bounces@xxxxxxxxxxxx
> [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Buck
> Sent: Tuesday, October 04, 2011 5:17 PM
> To: midrange-l@xxxxxxxxxxxx
> Subject: How much room is left on my LTO3 tape?
>
> For end of month, we do an additional SAVLIB *ALLUSR as well as a SAV of
> important IFS directories to archive the month.  To save some money, we
> put multiple months on a single tape.  We used to get 4 months on a
> single tape, but recently the 4th month overflowed.
>
> In Ye Days of Yore I could tell how full a tape was by looking at it.  I
> find that task a bit more difficult today.  If I do a SAVLIB
> OUTPUT(*OUTFILE) I get a 'saved size' in bytes but that doesn't help me,
> given compaction.  Also, the OUTFILE isn't available for the SAV
> command.
>
> If I do a DSPTAP OUTPUT(*OUTFILE) I get a fun column named RDTRL1 that I
> can parse out to find out how many blocks were used.  That seems a more
> reasonable way to figure out how big a given save set is but it also
> seems somewhat painful.
>
> Using the 'full' tape, I ran a query over the DSPTAP output and figured
> out that 5,714,007 blocks are on that tape.  So I at least have a first
> approximation as to the capacity in blocks for my particular mix of
> data.
>
> Is there a different way to work out in advance whether a given
> partially full tape will hold another save set?
>
> V5R4M5:
>
> select substr(rdtrl1, 5, 15) as library, decimal(substr(rdtrl1, 54, 7),
> 7, 0) as blocks from ultlabels
>
> select sum(decimal(substr(rdtrl1, 54, 7), 7, 0)) as blocktotal from u
> ltlabels
>
>   --buck