Formatting Fujitsu Eagles under 4.2 BSD Unix

[Karl Danz]

[]
>Also, adding new bad blocks to the list is a real pain -- the list of
>bad blocks is kept in sorted order, so when you add a block to it, all
>the ones after it must be shifted down one (i.e., you need to copy the
>contents of the forwarded block to the next physical block on the disk).

We were bitten by this same problem (on an Eagle as well).  I retched at
the thought of all that manual shifting and instead made the inclosed
one line change to /sys/vax/dkbad.c (4.2BSD).  I suppose it doubles the
average time spent looking up replacement blocks, but somehow I doubt
that's our major performance bottleneck!

-------------------------------------------------------
RCS file: RCS/dkbad.c,v
retrieving revision 1.1
diff  -r1.1 dkbad.c
25c25
< 		if (blk < bblk || bblk < 0)
---
> 		if (bblk < 0)
-------------------------------------------------------
-- 

					Karl Danz
					Cygnet Systems
					...!hplabs!cygnet!karl
					(408) 773-0770