If I have got my facts right ... The LVD SCSI standard is listed as being able to support up to 25m. The HVD standard 5m. Right now the F7** series supports HVD and not LVD. So it seems 17ft is the thing.
S
-----Original Message----- From: Jeff Bryer [mailto:bryer@sfu.ca] Sent: 11 July 2000 23:07 To: toasters@mathworks.com Subject: Max SCSI cable length
As we get closer to actually purchasing our new tape library, we've started to think about how things will physically fit in our machine room.
According to the NetApp manual, it says the max SCSI length for connecting a tape drive is 17ft. Is that the absolute maximum? I've heard people talk about 25metres. I'm inclined to believe the manual but I would much rather believe 25metres. Otherwise we're going to have to get really creative connecting 4 separate machines (2 of which are F740s) to one tape library via 4 separate SCSI buses on the library (don't ask ;).
Just browsing around, I found www.scsifaq.org. It shows :
speed of max single max HVD length Max LVD length fastest device --------------------------------------------------------------- 5 MHZ (Scsi1) 6M 25M 12M 10MHZ (S2 Fast) 3M 25M 12M 20MHZ (Ult. F20) 1.5M 25M 12M 40MHZ (Ult2 F40) <nr> 12M 12M
I'm supprised the F7**'s are HVD (didn't investigate it myself). Seems like HVD is going [slowly] by the wayside...
On Wed, 12 Jul 2000 steve.smart@netapp.com wrote:
If I have got my facts right ... The LVD SCSI standard is listed as being able to support up to 25m. The HVD standard 5m. Right now the F7** series supports HVD and not LVD. So it seems 17ft is the thing.
S
-----Original Message----- From: Jeff Bryer [mailto:bryer@sfu.ca] Sent: 11 July 2000 23:07 To: toasters@mathworks.com Subject: Max SCSI cable length
As we get closer to actually purchasing our new tape library, we've started to think about how things will physically fit in our machine room.
According to the NetApp manual, it says the max SCSI length for connecting a tape drive is 17ft. Is that the absolute maximum? I've heard people talk about 25metres. I'm inclined to believe the manual but I would much rather believe 25metres. Otherwise we're going to have to get really creative connecting 4 separate machines (2 of which are F740s) to one tape library via 4 separate SCSI buses on the library (don't ask ;).
-- Jeff Bryer bryer@sfu.ca Systems Administrator (604) 291-4935 Academic Computing, Simon Fraser University
----------- Jay Orr Systems Administrator Fujitsu Nexion Inc. St. Louis, MO
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Jay Orr -
steve.smart＠netapp.com