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Now that I'm thinking abuot it, these may not be SCA drives. There is a
single connector interface, which mayu be 80 pin, however, this is adapted
from the drive, which has a 50 pin connector and a standard power connector.
the tray that slides into the backpane is what joins the power and data into
a single connector - and from what i read about SCA, this connector would be
on the harddrive itself.
> Kevin:
>> Sounds almost like an SCA SCSI setup. Are the drives in trays that
>> look like they
>
> Yes!
>
> But I need to figure out the voltages for the power in. the backplane
> has a scsi in and scsi out - the CDROM and Tape were connected via the
> SCSI out. Also the cable had a SCSI external connector that was
> attached to a hidden window on the front of the AS/400.
>
> Where did you buy the SCA unit? Ideally, I'd like to put the disks in
> an external unit, because I cannot fit them inside the PC. I was
> considering trying to use the AS/400's chassis and backplane - but
> powering it seems like it maight be a kludge.
>
>> "W. Chris Shank" wrote:
>>>
>>> So I picked up a free AS/400 yesterday (and boy is my back killing me
>>> - badda boom!) I couldn't find any information about what it would be
>>> useful for outside of running OS/400, so I decided to strip out the
>>> disks.
>>>
>>> The results were: 3 9.1Gb 7200RPM LVD UW SCSI drives, 1 20X SCSI
>>> CDROM, and 1 QIC 2GB SCSI tape drive (and about 4 dozen tapes), and a
>>> large UPS.
>>>
>>> Also, the disk drive housing is removable. It seems to be a SCSI
>>> backplane (the drives plug into it) and holds up to 5 disks. I don't
>>> think the backplane does any hardware raid, but I'm pretty sure the
>>> AS/400 had a raid configuration since the original owners said it had
>>> a total capacity of 18G. Anyone know what other tail-tell signs of
>>> hardware would be? There is a PCI card that the SCSI cables are fed
>>> from, but this card is mostly blank - meaning there are very little
>>> electronics on it. And wouldn't a hardware raid want all the disks on
>>> seperate cables? or would that only be for high throughput (which is
>>> how i'd like to use the disks)?
>>>
>>> Anyway - if anyone knows anything about any of this hardware or can
>>> point me to some more resources (IMB doesn't give up much data on it)
>>> - please let me know.
>>>
>>> thanks!
>>> -Chris
>>
>>
>> Sounds almost like an SCA SCSI setup. Are the drives in trays that
>> look like they might be hot-pluggable (with a single connector for
>> power & scsi)? I've been playing with a 4 drive sca setup, and they
>> usually have some kind of interface board, like you describe, to split
>> scsi out for all the drives and combine the power signals into one
>> connector/cable per drive.
>>
>> On the system I worked with, the drive controller decides if you do
>> raid or not. It was a Mylex interface, and you could take all the
>> drives attached to it and configure them just about any way you want.
>> They could then end up as 4 individual logical drives, or all they way
>> up to raid 0,1,5, etc... So that part depends on the scsi controller
>> they are attached to (or even software, in the case of software raid.)
>>
>> --
>> Kevin Brosius
>>
>> ______________________________________________________________________
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>
>
>
> ______________________________________________________________________
> Philadelphia Linux Users Group - http://www.phillylinux.org
> Announcements-http://lists.phillylinux.org/mail/listinfo/plug-announce
> General Discussion - http://lists.phillylinux.org/mail/listinfo/plug
______________________________________________________________________
Philadelphia Linux Users Group - http://www.phillylinux.org
Announcements-http://lists.phillylinux.org/mail/listinfo/plug-announce
General Discussion - http://lists.phillylinux.org/mail/listinfo/plug
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