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| DATE | Sep 16, 1998 |
| TICKET | #315407 |
| STATUS | Closed |
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| TECHNICAL | |
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Question Details
TICKET ARCHIVE -> Hard drive slow down
No Wonder User - Sep 16, 1998 - 7:13 pm
Knowledge Level: Expert but stumped
Problem: Hardware
Computer Type: Apple
Model: PowerMac 8500/180
RAM: 65+
RAM Enhancer: None
OS Version: MacOS 8.1
Description:
I am having two main problems on my computer that may or may not be related. The first problem is with my hard drive. I use my computer for a lot of video editing. I use to get a data rate on my hard drive of 5.5 MB/sec which translated into about 28 frames per second. Now, I only get 3 MB/sec, or about 18 frames. I have tried everything. I have a separate partition where I capture, which is erased before starting. Extensions are minimized. I even re-installed OS 7.5.5 which was what was on the Mac at first, but I still only get the slower data writing.
The second problem is with my CD-Rom. It's an internal 8X Apple brand. When I use it, it works fine at first, but after a while it slows down. Example, if I copy a large file, I can see (In Speed Doubler) that Im getting a transfer of 1.1 MB/sec. (8X = 1.2 MB/sec) which is perfect. But after a while, my CD-ROM slows down to about 172k/sec, which is equivalent to a single speed CD-Rom. I think it might occur when the CD-Rom gets hot or something.
I thought that the problems were related, maybe my entire internal SCSI bus was slow, but the hard drive is ALWAYS slow, and the CD-ROM is only SOMETIMES slow. I don't know what it could be. I am hoping to be able to borrow a CD_ROM and hard drive and see if that fixes the problems (then its not the SCSI controller) but right now I can't do that.
Any suggestions?
I really appreciate this service. I think it's great!
Send Attachments? Yes
Problem: Hardware
Computer Type: Apple
Model: PowerMac 8500/180
RAM: 65+
RAM Enhancer: None
OS Version: MacOS 8.1
Description:
I am having two main problems on my computer that may or may not be related. The first problem is with my hard drive. I use my computer for a lot of video editing. I use to get a data rate on my hard drive of 5.5 MB/sec which translated into about 28 frames per second. Now, I only get 3 MB/sec, or about 18 frames. I have tried everything. I have a separate partition where I capture, which is erased before starting. Extensions are minimized. I even re-installed OS 7.5.5 which was what was on the Mac at first, but I still only get the slower data writing.
The second problem is with my CD-Rom. It's an internal 8X Apple brand. When I use it, it works fine at first, but after a while it slows down. Example, if I copy a large file, I can see (In Speed Doubler) that Im getting a transfer of 1.1 MB/sec. (8X = 1.2 MB/sec) which is perfect. But after a while, my CD-ROM slows down to about 172k/sec, which is equivalent to a single speed CD-Rom. I think it might occur when the CD-Rom gets hot or something.
I thought that the problems were related, maybe my entire internal SCSI bus was slow, but the hard drive is ALWAYS slow, and the CD-ROM is only SOMETIMES slow. I don't know what it could be. I am hoping to be able to borrow a CD_ROM and hard drive and see if that fixes the problems (then its not the SCSI controller) but right now I can't do that.
Any suggestions?
I really appreciate this service. I think it's great!
Send Attachments? Yes
No Wonder Tech - Sep 16, 1998 - 11:32 pm
Hello Sachin
Discounting a hardware problem, optimize all your disks and partitions, rebuild the desktops, and zap the PRAM. Normal maintenance stuff.
Fragmented files can slow down data writing, and application performance, quite a bit.
The CD is be another story. With very large files, Apple's CD ROM extension may not have a big enough cache to hold all the data. Third party programs, like FWB's CD ROM Toolkit, allow for custom settings of a CD's cache, among other preferences, and improve speed.
You may try raising the disk cache setting in the Memory control panel, and raise the memory allocation of the program you are using. I'm a little stumped since you said the disk and CD 'used' to be faster. A slow disk (4500 rpm) could hold you up, but that's beside the point. A Ram disk for your video program would speed up operations, too.
Please reply to this message if you have any further questions and/or comments.
Neil
+++++++++++++++++++++++++
Neil Meyers
No Wonder Technical Support
neilme@nowonder.com
http://www.nowonder.com
+++++++++++++++++++++++++
Discounting a hardware problem, optimize all your disks and partitions, rebuild the desktops, and zap the PRAM. Normal maintenance stuff.
Fragmented files can slow down data writing, and application performance, quite a bit.
The CD is be another story. With very large files, Apple's CD ROM extension may not have a big enough cache to hold all the data. Third party programs, like FWB's CD ROM Toolkit, allow for custom settings of a CD's cache, among other preferences, and improve speed.
You may try raising the disk cache setting in the Memory control panel, and raise the memory allocation of the program you are using. I'm a little stumped since you said the disk and CD 'used' to be faster. A slow disk (4500 rpm) could hold you up, but that's beside the point. A Ram disk for your video program would speed up operations, too.
Please reply to this message if you have any further questions and/or comments.
Neil
+++++++++++++++++++++++++
Neil Meyers
No Wonder Technical Support
neilme@nowonder.com
http://www.nowonder.com
+++++++++++++++++++++++++
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