Subject: questions on ccd
To: None <current-users@NetBSD.ORG>
From: Andrew Wheadon <>
List: current-users
Date: 06/28/1996 15:28:02
Hi everybody,
	I'm currently adding diskspace to my machine. Unluckily
	the 'ftp'-section will be too large to fit on the largest
	disk soon and since I don't want to keep having to move
	'.a', '.b' etc. around to accomodate changes in the structure
	I'll be using 'ccd'. (Assuming nobody tells me it's instable)

	Which is more reliable 'serial' or 'interleaved'. 
	If one chooses a 'serial' ccd0 is it possible to add
	another partition to increase the size of ccd0 without 
	loosing the information already on it ?

	How much faster will two identical disks be when
	using 'interleaved' in comparison to 'serial' with ccd ?
	These two identical disks are according to 'dmesg'
	different in that one is 'SCSI2' while the other is 'SCSI1'
	Will mixing the two on the same bus cause 
	(performance/other) problems ?

	Does one need to tweak any other kernel-parameters to
	avoid memory/buffer problems etc when using ccd ?

For the record:
NetBSD 1.2_ALPHA (WIPOOL) #2: Tue Jun 25 13:55:04 MET DST 1996
Pentium 32MB
ncr0 at pci0 dev 5 function 0: NCR 53c810 SCSI interrupting at irq 9
sd0 SEAGATE ST12550N SCSI2 2040MB, 2708 cyl, 19 head, 81 sec, 512 bytes/sec
sd1 FUJITSU M2266S-512 SCSI2 1029MB, 1658 cyl, 15 head, 84 sec, 512 bytes/sec
sd2 FUJITSU M2266S-512 SCSI1 1029MB, 1658 cyl, 15 head, 84 sec, 512 bytes/sec

The cost of living hasn't affected it's popularity. (Mark Twain)
current	release=doc \ "NetBSD-current mirror"
hostbase=/mit/ftp/pub/NetBSD base=/usr prefix=/usr backup delete use-rel-suffix