First, thanks to everyone who responded to my query last week:
alan_at_nabeth.cxo.dec.com
Herve DEMARTHE (CEA France) <demarthe_at_alpha.cad.cea.fr>
Rudolf Gabler <rug_at_usmu01.usm.uni-muenchen.de>
klg_at_mookie.bu.edu (Kim Greer)
"_(Selden E. Ball, Jr.)" <SEB_at_LNS62.LNS.CORNELL.EDU>
"Paul E. Rockwell" <rockwell_at_rch.dec.com>
sfeng_at_ced.berkeley.edu
falcons!rick_at_uunet.uu.net (Rick Stevens)
Our ST410800 drive is now installed and seems to be working fine.
Second, I'll indicate what worked (since it's relatively short) and
then I'll comment briefly on some of the other suggestions I received.
The following steps solved our problem:
1) add a termination plug to the back of the drive
(I know, I must be a fool to not have tried this earlier,
but my -feeble- excuse is that, as I read it, the drive
documentation suggests that the drive is terminated internally)
2) # disklabel -rw /dev/rrz6c ST410800 {given our SCSI IDs}
3) # newfs -m 01 /dev/rrz6c ST410800
That's it.
Other suggestions provided by one or more responders:
1) SCSI ID:
> On some systems the host adapter ID is set to 6. Verify
> that this isn't the case on yours. In general, unless
> you know for sure, it is best to avoid using 6 and 7,
> until you've run out.
This turns out to not be the case for us, but I never would have guessed.
2) /etc/disktab suggestions:
[i]
>st410800|ST410800|SEAGATE ST410800 9GB:\
> :ty=winchester:dt=SCSI:ns#133:nt#27:nc#4944:\
> :oc#0:pc#17753904:bc#8192:fc#1024:
[ii]
>I had similar experiences when I tried the first time one year ago to
>make a disklabel without a disktab entry for this disk. The problem was,
>that the amount of sectors disklabel reads from the geometry was too big.
>I reduced this by the use of the following disktab entry:
>
>elite9p|ELITE9T|Seagate Elite 9:\
> :ty=winchester:dt=SCSI:ns#134:nt#27:nc#4907:\
> :oa#0:pa#131072:ba#8192:fa#1024:\
> :ob#131072:pb#262144:bb#8192:fb#1024:\
> :oc#0:pc#17752614:bc#8192:fc#1024:\
> :od#0:pd#3550522:bd#8192:fd#1024:\
> :oe#3550522:pe#3550522:be#8192:fe#1024:\
> :of#7101044:pf#3550522:bf#8192:ff#1024:\
> :og#10651566:pg#3550522:bg#8192:fg#1024:\
> :oh#14202088:ph#3550525:bh#8192:fh#1024:
>
>(use disklabel -r rzxx elite9p)
>
>Note, that my c partition is smaller and this worked until yet without
>any problems. By the way, I spaced partition d to h equal in space and
>use the disk together with advfs. At the moment I have added d to f to a
>file volume with the intention to add g and h on the fly if more diskspace
>is needed ( don't show your users all you have). This system works for my
>4 Seagates with good results.
[iii]
> 1- If you want to use the /etc/disktab, here there is an entry :
>
>
> st410800|ST410800|SEAGATE Elite 9 9GB:\
> :ty=winchester:dt=SCSI:ns#133:nt#27:nc#4944:\
> :oc#0:pc#17753904:bc#8192:fc#1024
>
> I tried it successfully on a 3000/600 AXP under OSF/1 version 2.1,3.0
> Don't forget to set fast SCSI if applicable to your machine :
> >>> set fast_scsi_b on
> and to change defaults spare from 10% (= 900 MBytes lost !!!) to 1% :
> # newfs -m 01 /dev/rrz*c ST410800
Comments:
No setting for fast SCSI on a 2000/300. Then, for me, a puzzle. That is, the
suggestions above indicate two different (as far as I can tell) sets of
parameters; furthermore, both sets are different from what our "disklabel -r"
reported (and used):
1 2 3 Final(me)
---- ---- ---- ---------
ns: 133 134 133 133
nt: 27 27 27 27
nc: 4,944 4,907 4,944 4,926
pc: 17,753,904 17,752,614 17,753,904 17,755,614
It seems that there is something about disk drive arrangement that I
don't quite understand (if my ignorance is likely to cause problems,
given the configuration quoted above, please let me know. . .).
4. Other things to watch out for:
>3) Termination. Make sure the drive doesn't have any internal SCSI bus
> termination, and use an external terminator.
Thank you(seriously) for reminding me, but. . . Why external instead
of internal?
5. Partition size. Two individuals mentioned that they thought it
possible that there might be a 2GB partition size limit in OSF/1. As
far as I know (and I'm certainly willing to be corrected), this is not
true. Our docs suggest that 32 GB is the file system limit under DEC
OSF/1.
6. SCSI adapter designation. There was a suggestion that:
>The internal devices (i.e., boot disk and cdrom are on SCSI host adapter
>"a" /dev/dka300=boot disk, /dev/dka400=cdrom
>
>The out port on the back of the unit is SCSI host adapter "b"
This appears not to be the case for us; everything is on adapter "a".
In any case, thanks again to everyone who replied. Your assistance
was greatly appreciated.
Russ Murphy
Boston Research Data Center
US Bureau of the Census
2 Copley Place, Suite 301
P.O. Box 9108
Boston, Massachusetts 02117-9108
(617) 424-0550
(617) 424-0547 [fax]
rmurphy_at_census.gov
rdmurphy_at_bu.edu
Received on Tue Jan 24 1995 - 22:05:08 NZDT