On 01 Feb 2006 11:02:58 -0800, Vilmos Soti staggered into the Black Sun
and said:
> Dances With Crows <danSPANceswitTRAPhcrows@xxxxxxxxx> writes:
>> On 01 Feb 2006 09:04:03 -0800, Vilmos Soti wrote:
>>> We have a couple of Sony AIT/SAIT tape drives. The tape cartridges
>>> have something called MIC (Memory in Casette), which is essentially
>>> a 64KB memory chip. Does anyone know how can I access this MIC?
>> DLTs we bought from Quantum came with manuals that detailed all the
>> SCSI commands you could feed the drive and what each command did...
> That would be perfect for my needs, but [...] not much is in the
> documentation scsi-wise.
Well, that just sucks. I'd hoped it wasn't going to be like that, but
feared it'd be the case.
>> Googling gave me info-get@xxxxxxxxxxxx as a possible place to
>> contact for actual specs.
> Thanks. I checked them out, they might help us. However, I am not
> interested to buy any "backup solution". In the case of a disaster,
> we have one less thing to worry about (installing an extra software).
If you aren't interested in giving them money, they probably aren't
interested in giving you information. Sad, but that's typically how
this sort of thing works. Hope they don't do that.
>> I'd say the idea isn't that useful for the way most people use tapes
>> for archival and backup....
> What I am interested, if I can put my own data on the MIC, is to put a
> md5sum of each file on the tape. In that case, it would be really easy
> to verify the tape every six months, and the data and the md5sum would
> be on the same cartridge.
< thinking_out_loud reliability = "minimal" >
OK, that *would* be useful. I have a feeling it needs to be modified a
bit, considering the capacity of the MIC. A small backup tape for us
contains about 100,000 files. An md5sum of ... 34 files with filenames
in ASCII format came out to 2.3K. At 0.0676K per file, you'd be able to
fit ... um, about 900 md5sums with filenames into the MIC area. Maybe
an md5sum of the whole tarball? That'd be of limited utility, though,
since it'd be roughly like reading the whole tape and seeing if the
device coughed up any error codes on read....
< /thinking_out_loud >
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.
Re: MIC in Sony AIT/SAIT tapes ... >> md5sum of each file on the tape.... These are not regular backups for filesystems. ... copies (onto multiple types of tapes). ... (comp.os.linux.hardware)
Re: Lambda Calculus and Turing Equivalence ...>>(potentially infinite) and actually infinite. ...Turing said the TM ...physical memory in the universe, if every subatomic particle could be ... It doesn't matter if you consider the tape to be only hugely finitely large. ... (comp.theory)
Re: Lambda Calculus and Turing Equivalence ...>>(potentially infinite) and actually infinite. ...Turing said the TM ...physical memory in the universe, if every subatomic particle could be ... It doesn't matter if you consider the tape to be only hugely finitely large. ... (sci.math)
Re: turing completeness ... claim that the tape *must* be infinite.... >>The Turing Machine just needs to be able at will to drive to CompUsa ... computer runs out of memory its operating system aborts the TM ... (comp.programming)
Re: JCL ... The refrigerator sized cabinet not only housed this core memory,... Speaking of paper tape, anyone ever have to bootstrap a machine by entering ... Not the standard rectangular 80 column ones with rectangular holes...Northrup computer room.... (comp.sys.hp.mpe)
