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DLT8000 Tapes used in vs80?

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James Anker
Valued Contributor

DLT8000 Tapes used in vs80?

Hi,

Does anyone know if DLT IV tapes , previously written in a DLT8000, could be used in a vs80 drive without having to be bulk erased first??

Is it read write one way or both ways?

Thanks in advance.

Jim
12 REPLIES
Leif Halvarsson_2
Honored Contributor
Solution

Re: DLT8000 Tapes used in vs80?

Hi,
Medias medias used in DLT4000/7000/8000 drives must be bulk erased before used in DLT1 or DLT vs80 drives but, as I understand, it is no problem in the reverse direction (DLT1 media in a DLT8000 drive). The reason is different head tecnology. A DLT1/vs80 can't overvrite the media completly if it has been written in a DLT8000 before.
Vincent Farrugia
Honored Contributor

Re: DLT8000 Tapes used in vs80?

Hello,

The vs80 drive is backwards-READ-compatible only to DLT4000 drives. If the tape IV was written by a DLT7000 or DLT8000, they cannot be neither read nor written by a vs80.

They WON'T WORK even the other way round. If a DLT IV tape was written by a vs80 drive, there is no way a DLT4000/7000/8000 can read or write to it.

Unless bulk erased of course.

So, in short, no write is possible unless you bulk-erase. A vs80 can only READ a DLT4000-written tape.

Leif, please take note.

HTH,
Vince
Tape Drives RULE!!!
Eugeny Brychkov
Honored Contributor

Re: DLT8000 Tapes used in vs80?

Leif Halvarsson_2
Honored Contributor

Re: DLT8000 Tapes used in vs80?

Hi,

Vincent,
Are you sure about it is not possible to write a DLT media in a DLT 8000 drive if it has been used in a vs80 before. I found this document:
http://www.hp.com/products1/storage/products/tapebackup/dlt_tapedrives/dltvs80_drives/faqs.html#faq5

I understand it as the problem is the stronger magnetic field in the DLT 8000 write head, the vs80 can't overvrite the data compleatly. But if this is true, there should be no problem for the DLT 8000 drive to overvrite the information from the vs80 head.

Unfourtunatly I have no vs80 drive to try with.
Vincent Farrugia
Honored Contributor

Re: DLT8000 Tapes used in vs80?

Hello,

Sorry for my late reply, but yes I am sure.

Check this out:

http://h20015.www2.hp.com/en/document.jhtml?lc=en&docName=lpg50139

HTH,
Vince
Tape Drives RULE!!!
Leif Halvarsson_2
Honored Contributor

Re: DLT8000 Tapes used in vs80?

Hi,

I interpret this document different from you (but I don't say I am right).

It is clear that the media format is incompatible, a DLT8000 drive can't write vs80 media format (for example append data to a vs80 media) but this don't makes it impossible a DLT8000 drive can overvrite a vs80 media from the beginning (without bulk erasing).

Again, I am not sure. Anyone who has tried ?

Vincent Farrugia
Honored Contributor

Re: DLT8000 Tapes used in vs80?

Hello,

Look at "Tape format compatibility" from the same document for your answer:

http://h20015.www2.hp.com/en/document.jhtml?lc=en&docName=lpg50139#N10129

HTH,
Vince
Tape Drives RULE!!!
Dan_139
Advisor

Re: DLT8000 Tapes used in vs80?

It is strongly recomended by HP, to not Bulk erase the tapes. No matter what any documents say!
knowlegde is key to what?
Vladimir Vybiral
Valued Contributor

Re: DLT8000 Tapes used in vs80?

Hello,
The reason behind incomaptibility is not that much a stronger magnetic field, but the different position of DLT70-80 heads. DLT70 and 80 are using an angled style of writing so the head is not in upright position = this way it enables to store more data on the cartridge. However, vs80 has smaller heads so the angled position is not needed to put 40 gigs native on the tape. so it does not have the servo to do that to keep the drive cheaper.
best regards,

Vladimir
When speaking, Your words should sound better than Your silence - Arabic proverb
cspgmg
Occasional Visitor

Re: DLT8000 Tapes used in vs80?

Tech Note:
DLT 8000 and all earlier drives feature backward read/write compatibility. DLT1 and VS80 drives can read DLTtape IV written by the DLT4000 20/40GB drive (but cannot write to DLT4000, 7000 or 8000 formatted tapes), VS160 drives can read DLTtape IV written by DLT1 and VS80 drives (read only). SDLT-320 and SDLT-220 drives offer backward read compatibility with every DLTtape IV format, but no compatibility with VS1 cartridges. The SDLT-320 drives are read & write compatible with the SDLT-220 drive format. SDLT-600 drives can read SuperDLTtape I and VS1 cartridges.


Tape Drive Backward Compatibility

LTO-3 - Reads and writes LTO 2 and LTO 3 media, reads LTO 1 media.
LTO-2 - Reads and writes LTO 1.
SDLT 600 - Reads SDLT 320, SDLT 220 and DLT VS160.
SDLT 320 - Reads & writes SDLT 220. Reads DLT 8000, DLT 7000, DLT 4000, DLT1 & DLT VS80.
SDLT 220 - Reads DLT 8000, DLT 7000, DLT 4000, DLT1 & DLT VS 80.
DLT 8000 - Reads & writes DLT 7000, DLT 4000, DLT 2000XT & DLT 2000.
DLT 7000 - Reads & writes DLT 4000, DLT 2000XT & DLT 2000.
DLT 4000 - Reads & writes DLT 2000XT & DLT 2000.
AIT-3 - Reads and writes AIT-2 and AIT-1.
AIT-2 - Reads and writes AIT-1.
topsub
Occasional Visitor

Re: DLT8000 Tapes used in vs80?

I have a VS800 and I put a used DLTIV tape already written in.
The led "use cleaning tape" was blinking.
When I put a VS1 cleaning tape inside it stoped blinking bat whan I put again the used DLT IV tape inside, the led "use cleaning tape" was blinking again.

Is there something to do with a DLT8000 to erase the used DLTIV tape before to put in the VS80?
Or the VS80 is able to ask alone to erase it when we introduce a used DLT IV in it? If yes, my VS80 is defective!
topsub
Occasional Visitor

Re: DLT8000 Tapes used in vs80?

I have a VS80 and I put an used DLTIV tape already written in.
The led "use cleaning tape" was blinking.
When I put a VS1 cleaning tape inside it stoped blinking but when I put again the used DLT IV tape inside, the led "use cleaning tape" was blinking again.

Is there something to do with a DLT8000 to erase the used DLTIV tape before to put in the VS80?
Or the VS80 is able to ask alone to erase it when we introduce a used DLT IV in it? If yes, my VS80 is defective!