cp-v at the LCM,  system and swapping on 300MB packs.


On Sun, Jun 4, 2023 at 3:16 PM P Gebhardt via cctalk <cctalk@classiccmp.org>
wrote:

> Hi Rod,
>
> I don't blame them either! Operating these drives means having access to
> spare heads, alignment equipment and and alignment pack - not taking into
> account the work to be put in all of this!
> Anyway, thanks for sharing your anecdote with us :)
> Greetings,
> Pierre
>
>
> >I can't say I blame them.  It was a lot of work to get a drive running
> after a head crash.  If it was a bad crash, there >could be extensive
> cleaning to be done followed by replacing one or more heads.  Then the new
> heads had to be >aligned.  If you hadn't cleaned thoroughly enough, you
> risked damaging the expensive alignment disk.
> >
> >Once I came back from lunch to see the operators had 3 drives open.  They
> kept swapping a disk pack which was >giving I/O errors to new drives and
> were crashing heads along the way due to the damaged disk pack.  I stopped
> >them before they spun up the pack on a 4th drive.  That wasn't as bad as
> the time one of them dropped a disk pack >and bent platters.  That ripped
> heads completely out of the mounting mechanism.
> >
> >Ah, the good old days!
> >
> >Rod
>
> > On Jun 2, 2023, at 2:51 AM, P Gebhardt via cctalk <cctalk@classiccmp.org>
> wrote:
> >
> > Hi all,
> >
> > I just came across pictures on the LCM website about their SDS Sigma
> installation there.
> > On the pictures, one can see 10-platter disk packs in the corner and
> stored on the disk drives.
> > Did the LCM ever had these in operation, either for data retrieval or
> even demo purposes?
> > I know of the Jim Austin Computer museum where they fixed a CDC 9766
> drive but it suffered
> > a head crash after a few hours according to their description which led
> to giving up the operation
> > of these drives.
> >
> > Greetings,
> > Pierre
> >
> >
> -----------------------------------------------------------------------------
> > http://www.digitalheritage.de
>
>

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