Sorry for the delayed summary. Three weeks ago, I asked:
> Is it safe to disconnect a SCSI device with the CPU and other devices powered?
This was in reference to having a mobile CD drive.
The final tally was: 3 said it was safe to disconnect a SCSI device at any time,
9 people, among them firstname.lastname@example.org said words to the effect:
>It is possible that you can connect and disconnect without blowing the (SCSI
>My record is about 30-1 with no blown fuse. If you do this, however, be sure
>to L1-A to halt UNIX to the prom monitor first. Then, after the cabling is
>done, use "ok go" or "> c" to continue the CPU. It is still possible to panic
>the kernel doing this, so I would "sync" before halting, just in case.
>Obviously, devices that are "in use" should never be removed.
But most of these recommended powering down.
Another 9 respondents were more emphatic, and said you *must* power
down before fiddling with the SCSI bus.
email@example.com also mentioned:
"Apunix has a SCSI repeater box that is <$200 and will allow for live
connection/disconnection with no ill effects to the host and other devices."
In the future, I plan to halt the machine (at least) in emergencies, and
power down for planned hardware moves. It doesn't seem worth the risk to
play with a live SCSI bus.
Andrew Watson <firstname.lastname@example.org>
daniel@CANR.Hydro.Qc.CA (Daniel Hurtubise)
email@example.com (Elmar Kurgpold)
firstname.lastname@example.org (Jim Hoel)
aad@lovecraft (Anthony A. Datri)
Peter Samuel <email@example.com>
andrews@Erin.GOV.AU (Andrew Scarman)
todd@flex1.Eng.McMaster.CA (Todd Pfaff)
firstname.lastname@example.org (Eckhard Rueggeberg)
email@example.com (Greg Kastanek)
firstname.lastname@example.org (Birger A. Wathne)
trdlnk!mike@uunet.UU.NET (Michael Sullivan)
email@example.com (Wolfgang Kuehnel )
firstname.lastname@example.org (Chuck Yerkes)
email@example.com (LDC - Raul Silvera)
David Sansom <firstname.lastname@example.org>
email@example.com (Michael A. Parker)
firstname.lastname@example.org (Mark Deason)
ups!upstage!glenn@fourx.Aus.Sun.COM (Glenn Satchell - Uniq Professional Services)
Mike Raffety <email@example.com>
Bill Morrow voice: (403) 220-6275
Clinical Neurosciences fax: (403) 283-8770
University of Calgary e-mail: firstname.lastname@example.org
3330 Hospital Drive NW
Calgary, Alberta, CANADA
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