[Info-vax] Backup A Dying Disk.

[mcleanjoh at gmail.com]

On Thursday, March 19, 2015 at 3:44:20 AM UTC+11, Jerry Weiss wrote:
> On Wednesday, March 18, 2015 at 8:11:56 AM UTC-5, Phillip Helbig (undress to reply) wrote:
> > In article <mebruj$9gc$1 at dont-email.me>, David Froble
> > <davez&&&@tsoft-inc.com> writes: 
> > 
> > > Phillip Helbig (undress to reply) wrote:
> > > > In article <a2950ec9-8f65-4de8-b839-6062b280386b at googlegroups.com>,
> > > > wa2flq <jsw&&&@ieee.org> writes: 
> > > > 
> > > >> I have RD54 disk that that whose entropy is rising. Someone who doesn't hav=
> > > >> e a backup asked me to save what I can before it dies completely.  I realiz=
> > > >> e its probably a goner, but I want to give it a shot.
> > > > 
> > > > If the data are worth saving, where is HBVS?
> > > 
> > > On a MV-II ?
> > 
> > Possible.
> > 
> > > On VMS V5.2 ?
> > 
> > I don't know.  I came in at 5.5, but started using HBVS on 7.1.  I don't 
> > know when it was introduced.
> > 
> > > Shadowing is not a replacement for a good BACKUP strategy.
> > 
> > Right.  However, one thing it deals with really well is maintaining data 
> > integrity in the case of disk failure.
> 
> The system I am recovering data from was has been a hobbyist system.  So I'm just trying to recover what I can for my friend who came to Vaxen late.
> 
> I know the Maxtor XT2190 disks have a long history of bit rot.    I haven't seen the root cause (Bearings?  Electronics?) mentioned when I search around the next.  The server has a TK70. I may try to reformat the drive just for the "fun"  if can find the correct MV2000 XXDP program and remember how to generate a bootable tape.   
> 
> Most of my personal museum runs on Seagate SCSI-2 type drives and SCSI2SD emulation.

How are you trying to recover this data?

You've said 'trying to do a backup is painfully slow' but is that normal (file) Backup or BACKUP/IMAGE?