BSD4.2 file system configuartion questions.

[Piete Brooks]

1) Is it much slower to have a 4094/512 file system as opposed to 4096/1024 ?
   All I can see is that extending files a bit at a time is slower.
   Our version of disktab has some of each for comparable discs.
 
2) Why oh why is the default h partition 291346 blocks ?
   I would have expected a multiple of 16 (or even 32 !)
   One effect is that 'fsck /dev/hp2h' fails if it tries to read block 291344.
   (it worked with /dev/rhp2h! dumpfs gives:
	magic	11954	time	Wed Jan  9 12:54:16 1985
	sblkno	16	cblkno	24	iblkno	28	dblkno	284
	sbsize	2048	cgsize	2048	cgoffset 16	cgmask	0xffffffe0
	ncg	30	size	145673	blocks	137616
	bsize	4096	shift	12	mask	0xfffff000
	fsize	1024	shift	10	mask	0xfffffc00
	frag	4	shift	2	fsbtodb	1
	minfree	10%	maxbpg	256
	maxcontig 1	rotdelay 4ms	rps	60
	csaddr	284	cssize	1024	shift	8	mask	0xffffff00
	ntrak	19	nsect	32	spc	608	ncyl	480
	cpg	16	bpg	1216	fpg	4864	ipg	2048
	nindir	1024	inopb	32	nspf	2
	nbfree	3571	ndir	1151	nifree	48384	nffree	25
	cgrotor	21	fmod	0	ronly	0
   )