--- John Niven <[EMAIL PROTECTED]> wrote: <clip> > My real disappointment is that I had intended to > create a RAID array by > striping the disks, but if I do this, and install > OS8.1 on the stripe, > the machine just will NOT re-boot :-( > > Any suggestions?
Get HDT 4. It'll stripe across the two busses and may allow volumes larger than 4gig even on a 68k. Use one drive on the internal onboard bus at ID 0 for the System. It must be standard HFS. Put the CD-ROM on that bus at ID 1. Whichever one is at the end of the cable must be terminated, or use an IDC 50 passive terminator at the end of the cable. Hang everything else off the Jackhammer but don't use ID 0 or 1 on either bus on the Jackhammer. Now you can stripe or mirror volumes on the Jackhammer and if HDT won't let you create them as HFS+ you should be able to use the Erase menu option in Mac OS 8.1 to switch the RAID volumes to HFS+. PS. HDT 4 will allow you to create striped volumes across drives of different capacities while using the full space of all the drives. Striped volumes will have a higher data transfer rate than single drive volumes but the reads and writes per second will be lower overall due to the strategy of alternating reads and writes amongst all the drives. It takes a bit more time to do one write to one drive then switch to the next drive for the next write. HDT 4 has built in benchmarking so you can see the performance differences for a single drive or a RAID volume. I had two 2gig and two 1gig drives in a striped RAID on my Radius 81/110 and until I broke it down and benchmarked individual drives I didn't know that the 1gig drives pitiful writes per second of less than 180 per second was why it was so slow. I replaced then with another couple of 2gig drives with a higher write speed and it's finally able to capture video at 150K per frame. :) I'm thinking about getting another two 18.2gig 7200 RPM Seagate SCA80 drives and narrow SCSI adaptors and just striping them together on the internal bus. Individually they have plenty fast writes per second but "necked down" to 8bit narrow SCSI puts the data transfer rate in the dumpster. The two drive striped volume should easily kick up the transfer rate to handle the NuBus Media 100's top capture rate. ===== It's total Fandemonium! http://www.fandemonium.org __________________________________ Do you Yahoo!? Yahoo! Photos: High-quality 4x6 digital prints for 25� http://photos.yahoo.com/ph/print_splash -- Vintage Macs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Enter To Win A | -- Canon PowerShot Digital Cameras start at $299 | Free iBook! | Support Low End Mac <http://lowendmac.com/lists/support.html> Vintage Macs list info: <http://lowendmac.com/lists/vintagemacs.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/vintage.macs%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
