On Feb 18, 2006, at 6:06 PM, [EMAIL PROTECTED] wrote:
At 14:48:13 -0500 on 2/18/06, Len Gerstel <[EMAIL PROTECTED]> wrote:
1) remove the DLYD Start jumper,
you do not want the drive to delay startup.
I thought that just delayed response to the poll request so that the
drive had time to spin up to speed and thus would have no adverse
affects wrt mounting. ????
Found this on Hitachi's site:
http://www.hitachigst.com/hdd/support/dcas/dcasjum.htm
While for a different drive, the info and definitions should still be
the same.
Disable auto spin up (JP5)
This jumper controls how the drive starts when power is applied. If
the jumper is NOT installed then the file will spin up automatically
after power-on reset. If the jumper IS installed the file will NOT
spin up unless the host system issues a 'START UNIT' command to the
file.
Unit attention disable (JP7)
When this jumper is installed the drive will not generate a unit
attention following a power on reset (POR) or SCSI bus reset. Any
pending unit attention conditions will also be cleared at POR or SCSI
bus reset.
Auto start delay and delay start (JP9,JP10)
The auto start delay and delay start pins control when and how the
drive can spin up, with the combination of auto spin up option (JP5).
When in auto spin up and start delay mode the drive start will be
delayed by a period of time multiplied by its own SCSI address. If
auto spin up is disabled, these jumpers will be ignored.
Disable Auto Auto
auto start start
spin up delay delay
6/12
JP5 JP9 JP10 Option
-------------------------------------------------------
on don't don't Drive will NOT spin up
care care requires start command
-------------------------------------------------------
off off off Spin up immediately
after POR
-------------------------------------------------------
off on off Spin up six seconds
multiplied by SCSI
address after POR
-------------------------------------------------------
off on on Spin up twelve seconds
multiplied by SCSI
address after POR
You want the drive to spin up immediately after POR (powering the
system up)
I came found out about these settings by trial and error. You normally
won't hurt a drive with the jumpers in the wrong setting, and I found
that having those jumpers off normally worked for me.
HTH,
Len
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