Add the lun with an LDEV of 999.
Then change (MD) LDEV to 4. It won't take affect until the next reboot.
-Craig
On Thursday, February 22, 2024 at 10:10:48 PM PST, Tracy Johnson <[log in to unmask]> wrote:
Well I thought there was some network command for this. So maybe what
Keven said about something in NMMGR is correct.
What I wanted was to have a range at the beginning where there is
NOTHING. Say the first network user gets LDEV 30 or even 100. (Console
20 notwithstanding.)
Otherwise what happens if you have only 3 disc drives say 1, 2, & 3, one
LP at 6, one tape at 7...
The first several hundred schmucks that log on (all day and all night in
a 24/7 shop) get network LDEVs 4, 5, 8, 9, and 11 through 19, then 22 ad
infinitum. If the schmuck on LDEV 4 logs off the next guy will get it a
minute later.
So the thought occurred to me if I had a spare LUN lying around and I
wanted to spin up a new disc on the fly, it would have to be after the
last user on the last LDEV, it would get for example ... LDEV 449.
Because it can only take a non existent LDEV number nothing is using. It
just isn't pretty in the disc LDEV numbering scheme.
So if I wanted LDEV 4 in a 24/7 shop I'd have to wait until a planned
shutdown. Or I could spin up LDEV 449 now and just not give a damn.
Then just wait before the next shutdown and do an MD on 449 in SYSGEN to
make it LDEV 4 and do a KEEP before the reboot. The LUN won't care it
is just a path.
On 2/22/24 22:30, Craig Lalley wrote:
> When configuring a DTC, LDEV's can be configured. We usually took the
> lowest open ldev's.
>
> So, I think Ldev's start shortly after SYSGEN devs.
>
> -Craig
>
>
> On Thursday, February 22, 2024 at 01:05:17 PM PST, Tracy Johnson
> <[log in to unmask]> wrote:
>
>
> Anybody remember what was that setting you tell the HP network to start
> using session at a certain low LDEV number?
>
> Otherwise the session ldevs take the lowest number available?
>
> --
> Tracy Johnson
> BT
>
>
>
>
>
>
>
> NNNN
>
> * To join/leave the list, search archives, change list settings, *
> * etc., please visit http://raven.utc.edu/archives/hp3000-l.html *
--
Tracy Johnson
BT
NNNN
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