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Much varying PC internal speeds case no 2.

By PeteVfi ·
Hi!

Here you have the second case.

Case no 2. Quite new P4/1.8GHz desktop with Promise Ultra133TX2 PCI-IDE extra channels

This case is somehow a far relative case with the case no 1.

On this system I do have in use quite many 120GB disks, 3 work disks on the mobo IDE-channels (the 4th unit on these is a rarely used multiformat DVD-RW) and 4 back-up disks on the extra PCI-IDE channels. When taking the back-ups to the PCI-IDE disks, I have sometimes got one about 90GB back-up taken in just 1 hour, but the worst cases have been about 8-12 hours, and sometimes I have also been seeing the estimated time to be 1 day 8 hours or so, but then I did go on just some 10-15 minutes to see if the speed would be increased, but not, and did re-boot and got some more sensible estimated maybe 4 hours time for it. The tool used for this is the regular MS Windows 2000 Back-Up Utility, and the Win2000Pro in use is on SP4 level with all actual updates etc. And, mostly I have only 1 of the 4 back-up disk drives powered-on, to eliminate any other maybe disturbing traffic on the PCI-IDE channels.

So, what is actually regulating or having strong influence on the speed on these PCI-IDE channels?
I have been testing all this with at least 5-6 different types of ATA/133 cables, flat/round short/long etc., but always with the same level of results, also another same brand PCI-IDE card was tested with the same results, maybe I'll still test with another brand card ...

If anyone is familiar with this type of case, please give any comments ...


Best regards,

Pete V.

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by rindi1 In reply to Much varying PC internal ...

Turn off all unnecessary other Software running on the PC during the Backup Operation. Antivirus software is often a reason for bad throughput. If you're sure you don't have virae on the PC you can turn the realtime virus protection off during your backup process.

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by PeteVfi In reply to

Yes, I already previously did turn off all unnecessary processes and did dedicate the machine just for these back-ups. Also the viruses and spyware etc. were several times carefully checked. Sorry, no points, the problem was too much far away on other thing.

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by zlitocook In reply to Much varying PC internal ...

It depends on the amount of data being backed up and the media used. It could also depend on the processes running on the computer it is making the backup from. If the backup is told to backup all it could wait for processes to stop befor continuing the backup. Try to be selective in your backup, do a full back on the weekend and only changed files during the week.

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by PeteVfi In reply to

Yes, the daily back-ups are always taken as selective and the full back-ups during the weekends, dedicated with no other processes on, but still sometimes the back-ups weren't ready when the working morning came ... Sorry, no points (I could give some 100, but there is no such procedure?), the problem was quite close, but on other thing.

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by PeteVfi In reply to Much varying PC internal ...

Hi!

Sorry for the delay in coming back to this topic.
It has been taking quite much time and effort to test/analyze this case thoroughly enough to get the problem point discovered. To the obtained 2 answers I'll give more directed responses separately.

The real problem point has been proving to be on the Kingwin KF-23-IPF IDE Mobile Racks/Trays, inside which the disks are installed, and more detailed, maybe, on the Centronics type connector on/between the trays and the racks, and maybe, also on the positioning of the short 2" IDE 80-wire cable inside the disk tray. The transfer speeds on these ATA/100/133 buses have been reaching at max. 55 MB/s, usually some 30-40 MB/s, but on worst cases, with some harm on the above mentioned points, just some 5-10 MB/s ... So, the time to back-up 1x100GB has been from about 1 to 12 hours, and to back-up all the 3x100GB simultaneously from about 4 to 30 hours. All the disks are Maxtor DiamondMax+ 120GB/8MB/7200rpm/ATA/133 and the back-ups are taken to the disks through Promise Ultra133TX2 PCI-IDE card/channels. But, the transfer speed has not been proven to get down due to the PCI-IDE.

So now, after carefull selection of the racks and some fixings, the full back-up time for all the 3x100GB simultaneously has been proving to got down to about 4 hours.


Best regards,

Pete V.

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by PeteVfi In reply to Much varying PC internal ...

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