dump on old 1.2 Ultrix...

[Chuck Karish]

In article <7484 at cbmvax.UUCP> grr at cbmvax.UUCP (George Robbins) wrote:
>In article <4082 at portia.Stanford.EDU> karish at forel.stanford.edu
(Chuck Karish) writes:
>> In article <412 at wuee1.wustl.edu> tjs at wuee1.wustl.edu.UUCP
(tom sullivan) wrote:
>> >we're still running old Ultrix 1.2 on our uVAX-II/GPX.

>> >is there an optimal setting (density, lenght, blocking factor, etc.)
>> >to do dumps onto a TK50 drive.

>> As George Robbins points out, dump accepts the `-b' flag.  The maximum
>> value for this flag is 126, as in 126 blocks or 63K.  This works for
>> tar, too, and speeds up the TK50 a lot.

>Does -b 126 really work with TK50's?  I get the feeling you're generalizing
>from Suns, rather than DEC stuff.  My recollection is that -b 63 is the
>biggest that will work with traditional (massbus TU78) drives, and there
>are blocksize limitations described for the PMAX SCSI TK50 that would
>limit you to -b 32.


	A uVAX-II/GPX has neither a Massbus nor a SCSI bus, and
	`-b 126' works.  I used it for a tar backup to TK50 on a
	uVAX-II/GPX running 3.0, last week.  It's been a while since I
	used the flag on a 1.2 system, but it worked then, too.  I'm
	not absolutely sure that it worked on dump/restore, but I think
	it did.



	Chuck Karish		{decwrl,hpda}!mindcrf!karish
	(415) 493-9000		karish at forel.stanford.edu