Date: Mon, 25 Nov 1996 18:30:20 -0600 (CST) From: David Kelly <dkelly@hiwaay.net> To: hackers@freebsd.org Subject: Re: Holy Moley Batman... I love ccd. and BTW, if you need 4gb d Message-ID: <XFMail.961125183859.dkelly@hiwaay.net> In-Reply-To: <199611251522.KAA10615@rk.wbs.com>
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On 16:22:33 Rashid Karimov wrote: >> I had read/write at about 18+ Mb/sec ( didn't use IOZONE > though - was doing dd on huge files - 300+ MB, back and > forth between /dev/ull , /dev/zero and CCD based 25GB > partition. > > Total of 3 wide AHAs and 6 Seagate Barracudas were used > at 200 Mhz PPRo MB by ASUS. > > That was quite a box ( was used for USENET news ). Sounded > like a subway train all the time ( 6 HDs !), was very stable > and fast. > > As far as I remember I had 256 in the ccd.conf file - it gave > about even read and write speeds. This sounds a lot like something I'm going to try, only the opposite. Was cleaning things out recently and noticed I had 6 small SCSI drives, (1) 40M, (1) 80M, (3) 105M, and (1) 120M. Was going to use a 1542CF but a co-worker had a VESA Adaptec and wanted an ISA Adaptec. It looks like I can fit all 6 drives in an external SCSI case that originally held a 5-1/4" FH drive and fit under a classic Mac. Building the internal SCSI cable isn't going to be too hard but the power routing looks like it could be a disaster if I try to do it the easy way and buy bunches of 1-in-2-out power splitters. Have seen insulation-displacement style floppy/hard drive power connectors on some systems lately but haven't found a source. It would be pretty easy to run a power bus with those power connectors pressed on at each hard drive, much like the 50 pin connector on ribbon cable for SCSI. Anybody know of a source of these power connectors? -- David Kelly N4HHE, dkelly@hiwaay.net ===================================================================== The human mind ordinarily operates at only ten percent of its capacity -- the rest is overhead for the operating system.
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