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IDE Problems

 
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Alan T Kelly
Advisor

Re: IDE Problems

thanks again for your help Andrew.

im pretty sure your right about the DMA2 being for the cd drive.

however i am still concerned that my hard drives arent functioning properly.

the reason being that it takes about 1 hour to back up 8gigs of data (yes 8) to an external usb disk (usb 2.0 7200 rpm)

whereas i recently set up another SBS installation (2 SATA drives, no RAID) and watched it back up 25 gigs in about 15 mins.

I realise theres a SATA Vs IDE performance difference, but should it possibly be anything like this sort of difference. I think not.

Is anyone out there backing up a similar config? are my times really slow or is this about right for an IDE RAID 1 setup?

Alan T Kelly
Advisor

Re: IDE Problems

i should also add here that none of my HP Array configuration utilities work.

I dont know if this is correct, i dont see the csb-b in the list of supported controllers. but it is possibly there under another name??


Andrew Young_2
Honored Contributor

Re: IDE Problems

Hi Alan.

With that performance loss I'm almost sure you are running into USB throughput put problems and not HDD issues. According to the HP site the ML330 G3 does not support USB disk drives. I suspect that the USB ports on that server are USB1.1 and not USB 2.0 athough I cannot get confirmation of this from any of my product lists.

To test the HDD's performance copy the 8Gb data from one folder to another. If its the disk the operation will be slow. My ATA100 test rig is at home unfortunately so I cannot duplicate that test immediately.

HTH

Andrew Y
Si hoc legere scis, nimis eruditionis habes
Alan T Kelly
Advisor

Re: IDE Problems

Andrew,

yes your right about the ml330 only having usb 1.1 but I installed a 2.0 PCI card when I bought the server specifically for handling backups.

I really think I have performance issues with the drives in the server and am about to upgrade to RAID 1+0 so Id like to get to the bottom of it either way before I do.

thanks again,
AL
Andrew Young_2
Honored Contributor

Re: IDE Problems

Hi Alan

There is one other situation that might be relevant where I have had performance problems on Windows, but this more the nature of the data and a Windows issue more than a hardware problem.

Where we have had a lot of data made up of small files but large numbers (1 Tb - 140 million+ files) we experienced large performance drop when doing sequential file reads. Apparently you will also get similar problems with a badly fragmented filesystem.

You are not running OS file system compression or encryption are you?

When doing the copy what is the level of the CPU utilisation in Task Manager?

HTH.

Andrew Y


Si hoc legere scis, nimis eruditionis habes
Alan T Kelly
Advisor

Re: IDE Problems

Hi Andrew,

no there are no fragmentation / compression / encryption issues.

anyway, i enabled write caching in the bios (i have an UPS) and i got a drastic improvemnt straight away.

tonight im going to upgrade the firmware as i think there are still improvments available (HP diagnostics is showing no UDMA or SMART on the drives) and if all goes well ill be upgrading to RAID 5 tomorrow.

I drop a note to close the thread tomorrow. but in the meantime thanks for all you help and keep up the good work.

Al

(PS I may well be disaster recovering tomorrow so keep an eye out in the threads for an 'ol friend, wont ya)
Alan T Kelly
Advisor

Re: IDE Problems

Hi Andrew,

Updated the bios / firmware last night and all went well. it didnt pick up any updates for the raid controller tho so im still stumped.

thanks again for all you help,
Al
Alan T Kelly
Advisor

Re: IDE Problems

my understanding of the situation has changed. i need a new line of attack.