Date: Tue, 19 Nov 2002 06:35:07 +0000 From: barnacle <[EMAIL PROTECTED]> Subject: Re: [LIB] HELP!!!! My 50ct can't boot up suddenly after overclock!!!!!
On Monday 18 Nov 2002 11:27 pm, you wrote: > Date: Tue, 19 Nov 2002 07:26:22 +0800 (CST) > From: =?big5?q?tradelink=20tradelink?= <[EMAIL PROTECTED]> > Subject: HELP!!!! My 50ct can't boot up suddenly after overclock!!!!! > > I am now using IBM 6.4G harddisk Travelstar 6GN (model > > : DBCA-206480), it worked find until I overclocked my > > 50ct.... > > I cut the pin 15 of W48C54A chip last night and hope > my 50ct will go up to 100MHz. > > My bad dream come..... > > My 50ct can't boot up again no matter I :- > 1) boot up with floppy and "fdisk/mbr" or > 2) boot up with floppy, delete my FAT partitions (I > used to boot from FAT partition), recreate them and > format/s the boot partition again > > I can complete all above operation without any error, > but my libretto just can't bootup again with hd. > I can even see the complete content in partition after > I boot up with floppy(of course, before I format my > hd). > > It's strange that when I swap 6.4G hd with the > original 810Mb toshiba hd, it works again..... > > Is it due to the limitation of bios for handling large > harddisk? (It should not be, since my hd works fine > before I o/c) or due to overclock? > Should I reconnect pin 15 to make it works again? > > Please help!!!! > This is odd...but something we've seen before with IBM disks. You may have to search the archives, but I've seen two cases (on my machines) where pin-15 overclocking didn't work. Occasionally, the disc interface chip won't work at the higher bus speed, so no boot - but yours boots with the original tosh disk, so it doesn't look like that. The other problem is that some IBM disks won't work at the higher speed. If you use the IBM test disk that sometimes comes with them, you'll find it reports something like 'faulty cable'. Here's the fix that worked for me: clock the bus speed down to 50 by reconnecting pin 15, then increase the multiplier on the processor. It's a bit more complex to get to - I think the instructions are on Xin's site - but that should give you 100MHz on the processor. It's not as fast on i/o bound applications (disk, memory access is still at the old speed) but compute bound apps benefit (mpg replay etc) Neil ************************************************************** http://libretto.basiclink.com - Libretto mailing list http://www.silverace.com/libretto/ - Archives -------TO UNSUBSCRIBE------- Reply to any of the list messages. The reply mail should be addressed to: [EMAIL PROTECTED] - Then replace any text on the message's subject line: cmd:unsubscribe --------TO UNSUBSCRIBE DIGEST------ Do above but with this on subject line: cmd:unsubscribe digest **************************************************************
