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тАО10-05-2010 06:59 AM
тАО10-05-2010 06:59 AM
Note:
1) I have attempted this with 3 different drives thus far with the same result.
2) Once the tape gets into this condition, I need to manually remove the tape and rewind it into the cartridge. No amount of power cycling or resets of any nature will rewind or unload the tape.
Any suggestions?
Thanks,
Dan
Solved! Go to Solution.
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тАО10-05-2010 07:20 AM
тАО10-05-2010 07:20 AM
Solution- Mark as New
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тАО10-05-2010 07:43 AM
тАО10-05-2010 07:43 AM
Re: Unable to read entire TK50 tape - Suggestions needed.
Way back we regularly had similar issues.
If turned out, that reading such tapes with a non-SCSI drive regularly succeeded (with a number of "recoverable media errors").
SCSI however is unable to proceed past a single parity error.
( That is why we used to say that SCSI was pronounced like the Italian Scusi "I am so sorry" -- for the poor quality.
But SCSI was less than 10% the cost of solid DEC-style periferals, so ....
_IF_ you can sill find and operational TK50 or TK70 drive, you stand a fair chance. You WILL need patience! But NO way I can guarantee success. Just as Hoff said: it is already old stuff, and the repeated tries have done nothing to improve them!
Proost.
Have one on me.
jpe
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тАО10-05-2010 07:51 AM
тАО10-05-2010 07:51 AM
Re: Unable to read entire TK50 tape - Suggestions needed.
Thanks for the suggestions.
Dan
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тАО10-05-2010 08:23 PM
тАО10-05-2010 08:23 PM
Re: Unable to read entire TK50 tape - Suggestions needed.
Now if it were my data I might carefully try to fiddle around with the cartridge and make triple sure that the tape wasn't buggered inside the "can" so to speak. We used to have some bizarre experiences at a former employer where all our 40 production MicroVAXen had their reloadable personalities on TK and we never knew if the tape drive had a ton of drywall dust or a herd of dust bunnies inside the drive. Reloading was always a challenging toss-up.
If you can't get the data directly yourself we might trade contact info if your options dry up.
bob
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тАО10-06-2010 02:56 AM
тАО10-06-2010 02:56 AM
Re: Unable to read entire TK50 tape - Suggestions needed.
I'll be resurrecting a couple of Flamingos this week end too. Should be fun.
Dan
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тАО10-06-2010 05:10 AM
тАО10-06-2010 05:10 AM
Re: Unable to read entire TK50 tape - Suggestions needed.
Thanks,
Dan
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тАО10-06-2010 10:15 AM
тАО10-06-2010 10:15 AM
Re: Unable to read entire TK50 tape - Suggestions needed.
GENTLY rewind the tape (counter-clockwise as seen from the underside of the cartridge) and it will wind back up into the TK cartridge. I use a wimpy power screwdriver to do this, since it takes lots and lots of revolutions to get it all back in.
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тАО10-06-2010 10:28 AM
тАО10-06-2010 10:28 AM
Re: Unable to read entire TK50 tape - Suggestions needed.
My technical contact there was Matt Parker at extension 239, but it's been a few years since I spoke to him, so I don't know if he's still there.
You'll want to clean the head after each tape (or attempt). Use non-fabric cleaning wipes and isopropyl alcohol to clean the head -- you have to pull the clear (usually) shield off the inside of the drive to get to the head.
You might guess that I've spent entirely too much time inside the TZ87 hardware...
Unfortunately, if you pull a hard error on the drive, you're dead. There was some "diagnostic" firmware that would let you continue, but it was never released into the wild. Some very expensive recovery shops like OnTrack Data Recovery (http://www.ontrack.com/datarecovery/servicequote.asp?PartnerID=2337811) [yes, I'm a partner] might have that firmware. I've never asked.
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тАО10-06-2010 10:41 AM
тАО10-06-2010 10:41 AM
Re: Unable to read entire TK50 tape - Suggestions needed.
Thanks for the suggstions.
Dan