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PERC 5/i RAID Card: Tips and Benchmarks - Page 335

post #3341 of 7180
Quote:
Originally Posted by Stereodude View Post
I'm running XP x64 with a Perc 6/i using the most recent Dell Server 2003 x64 drivers (6/30/2009) and I noticed that the "Enable write caching on the disk" box for the DELL PERC 6/I SCSI Disk Drive in the device manager is unchecked. When I check the and box and later go back into the settings it's unchecked again. In the Event Viewer under the System section there's a warning with the following message, "The driver disabled the write cache on device \\Device\\Harddisk1\\DR1."

Now obviously the card is very fast and has it's own cache and settings, but why does it prevent Windows from also using it's write cache?
Using both the windows write cache and the card's writeback cache would have a detrimental effect on performance, so they disable it at the driver level. It also would cause the BBU to be basically worthless because if the data was cached in 2 places, it would need battery backup in both places.
    
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post #3342 of 7180
Quote:
Originally Posted by DJZeratul View Post
Using both the windows write cache and the card's writeback cache would have a detrimental effect on performance, so they disable it at the driver level. It also would cause the BBU to be basically worthless because if the data was cached in 2 places, it would need battery backup in both places.
I took it to be refering to the on-disk cache, not the Windows cache (ie the -32MB of cache each disk has - this can be used or disabled by the drivers).

The end result is the same though - you don't want 2 caches, as you want/need to ensure only the battery-backed cache on the card holds any unwritten data to make sure data corruption does not occur in the event of power loss.
post #3343 of 7180
I am picking up a P55 board, I heard that the the PERC 5/I board works without the pin mod on the X58 and was wondering if this also true for the P55 chipset?
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post #3344 of 7180
Applogies if this question has already been covered.. I did some fourm searches but didn't come up with anything.

Just got my new perc 5/i in the mail. Can't get it to post though, getting a post audio error of long + short + short. Anyone else run into this?

It's pointing towards a general video fault. I've made sure that PCI is set for video in bios, as I have a pci video card hooked up.

My motherboard is an M2N SLI Deluxe which I've read in a couple places is compatible. Any suggestions guys?
post #3345 of 7180
Tape / cover pins 5 & 6 on the card and try again.
post #3346 of 7180
Update on working config:

MSI P45D3 Platinum
4GB DDR3 (extra 4GB comes tomorrow)
Windows 7 Enterprise RTM x64


PERC 5/i with latest (.72) Intel firmware and Intel Server 2008 x64 driver
8x 36GB Seagate Savvio 15K SAS disks, RAID5
Intel Web Console 2

No BBU yet, will see how it reboots with intel's firmware

Works very nice, finally saturating my GBit LAN - 125MB/s from PERC to PERC over LAN

All required software is here (choose Server 2008 as target OS):

http://downloadcenter.intel.com/Sear...13&FamilyId=37
post #3347 of 7180
Quote:
Originally Posted by Stereodude View Post
Tape / cover pins 5 & 6 on the card and try again.

That did the trick, thanks!

I wonder why it was an issue though, I was told that only Intel chipsets had the SMBus issues, mine is an n-vidia. Any idea?
post #3348 of 7180
Quote:
Originally Posted by shake1dde View Post
That did the trick, thanks!

I wonder why it was an issue though, I was told that only Intel chipsets had the SMBus issues, mine is an n-vidia. Any idea?
What Nvidia chipset is it?
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post #3349 of 7180
Quote:
Originally Posted by shake1dde View Post
That did the trick, thanks!

I wonder why it was an issue though, I was told that only Intel chipsets had the SMBus issues, mine is an n-vidia. Any idea?
NVIDIA nForce 570 SLI MCP
post #3350 of 7180
Quote:
Originally Posted by shake1dde View Post
NVIDIA nForce 570 SLI MCP
Some of the nForce chipsets need it as well. It has to do with the IRQ that the SMBus operates on, most of nvidia's chipsets use different IRQs than the PERC but some use the same conflicting IRQ.

I bet the 570 SLI MCP is one that uses the same conflicting IRQ, if covering the pins helped you out.
    
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