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- From: jeh@cmkrnl.com
- Newsgroups: comp.sys.dec
- Subject: Re: RD53s won't stay spun-up
- Message-ID: <1993Jan3.104543.1061@cmkrnl.com>
- Date: 3 Jan 93 10:45:43 PST
- References: <1993Jan2.160631.1058@cmkrnl.com>
- Organization: Kernel Mode Consulting, San Diego, CA
- Lines: 28
-
- Thank you to the folks who have already sent me e-mail re this problem. Both
- of you suggested power supply problems. However I have pretty much eliminated
- that:
-
- - The power supply in the PC does not seem to be at fault;
- it is perfectly happy running two full-height 5-1/4 drives.
-
- - If I put the jumper back in and try the drives in a BA123, the
- same thing happens -- they shut down just about the time that I'd
- expect them to be up to speed. Meanwhile the power supply in the
- BA123 seems to be working fine with other drives.
-
- - These drives used to work in this same BA123 cabinet.
-
- - Voltage checks (with a good DMM) on both supplies show no
- problems.
-
- I really doubt that both the PC and BA123 power supplies went flaky
- in the same way at the same time (but only with these two drives).
-
- I can't help thinking that I "bumped something" in the drives while pulling
- the R7 jumper.
-
- (Just what does that jumper do, anyway?)
-
- --- Jamie Hanrahan, Kernel Mode Consulting, San Diego CA
- Internet: jeh@cmkrnl.com, hanrahan@eisner.decus.org, or jeh@crash.cts.com
- Uucp: ...{crash,eisner,uunet}!cmkrnl!jeh
-