[net.micro.att] 3B2's and Floppy diskettes

ma175xab@sdcc3.UUCP (Rob Brunner) (10/10/85)

	Can someone answer a question for me?  How many blocks
	can be stored on a floppy with the 3B2/300?  I'm not using 
	the sysadm menu (could manually scribe the info in that 
	amount of time), and I'm not mounting a file system.
	I'm just using:
		find . -print | cpio -ocvm > /dev/diskette
	to backup entire directories (directories of dbase files)
	on a daily basis.  What is the limit on the number of 
	blocks that can be stored on DD, DS, 96TPI floppies?
	how about 48TPI's? 

				Thanks in advance.
				Rob Brunner
				..!sdcsvax!sdcc3!ma175xab

randy@chinet.UUCP (Randy Suess) (10/13/85)

In article <3018@sdcc3.UUCP> ma175xab@sdcc3.UUCP (Rob Brunner) writes:
>
>	Can someone answer a question for me?  How many blocks
>	can be stored on a floppy with the 3B2/300?  

	1422 blocks (USING YOUR AT&T XM page 6-81)

>		find . -print | cpio -ocvm > /dev/diskette

	You shud be doing a '> /dev/rSA/diskette' as that will prompt you
for another media when the one fills up.  That way, you won't have to
worry bout how much will fill a diskette.  Just format up a trillion
before hand and start feeding them in.

.. that's the biz, sweetheart...
Randy Suess
chinet - Public Access UN*X
(312) 545 7535 (h) (312) 283 0559 (system)
..!ihnp4!chinet!randy

larry@kitty.UUCP (Larry Lippman) (10/26/85)

> 	Can someone answer a question for me?  How many blocks
> 	can be stored on a floppy with the 3B2/300?  

	1422 512-character blocks counting the boot partition is the theoretical
maximum for the 96TPI drive

> 	What is the limit on the number of 
> 	blocks that can be stored on DD, DS, 96TPI floppies?

	see above

> 	how about 48TPI's? 

	Apparently that option does not exist

	As an aside, the 3B2 System Administration Manual says the diskette
should be set with 192 inodes when using `mkfs'.  That is just a nice arbitrary
number, and in fact you can mkfs any number of inodes you want with no problem. 
You will, of course, lose free blocks as additional inodes are allocated.

===  Larry Lippman @ Recognition Research Corp., Clarence, New York        ===
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