PCI-64bits (100Mhz or 66Mhz) for Perc 4/SC

Hi,

Perc 4/sc and 4/dc can be installed in a Dell™ PowerEdge™ computer with a motherboard that has 5V or 3.3V, 32 or 64-bit (66 or 100MHz) PCI slots.

http://docs.us.dell.com/docs/storage/perc4sc/UG/en/index.htm

The Perc will work most efficiently in the 64-bit, 100MHz slot.

Thanks for using the Dell Community Forums!

Hello Mark A!

i have got some problems with your answer that you can put the PERC 4/SC Controller into a PCI-64 BIT Slot

either with 66 or 100MHZ Bus Speed, and that the best performance will result in putting it into a 100MHZ slot.

If you put this controller into a 100MHZ PCI Slot the Slot reduces its speed to 66MHZ.

So what ya tell cannot be true.

Even a PCI Slot with 66MHZ has enough performance backups for more powerfull RAID Controllers.

Apart from this i have got another question!

My PERC 4/SC needs 4,30 minutes to copy 1,2GB to a another partition in a RAID 5 Array !

Is that normal ? No its not !

So what could be the problem ?

I got a POWER EDGE 1600 SC Server A09 BIOS, PERC 4/SC U320 Raid Adapter 3,28 FW 

2 x Seagate U320 10K 36,7GB Harddisks

1 x IBM/Hitachi U320 10K 36,7GB Harddisk 

Harddisks running in a RAID 5 Array with: write trough, direct/IO,adaptive read controller has auto termination.

maybe some ideas what i can do against the lousy performance.

Thanks in advance

asdermann