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PERC 5/i RAID Card: Tips and Benchmarks - Page 567

post #5661 of 7176
Quote:
Originally Posted by zoddan View Post
The model is ST373455SS

Yes i have 2008 R2 on those drives.

Then I think you have the answer

Drives are a little bit old Only 16MB cache, 73MB-125MB/s and you have OS on the same drives
post #5662 of 7176
Quote:
Originally Posted by RobiNet View Post
Then I think you have the answer

Drives are a little bit old Only 16MB cache, 73MB-125MB/s and you have OS on the same drives
Ok so this is what i should expect?
Low access time anyway hehe

I was choosing between these drives and WD velociraptor 150GB.
And o took these because 15K RPM and SAS.
post #5663 of 7176
Well, I have to report that I'm happy with my PERC5 purchase. I did mention some potential speed issues earlier but, it's just storage. Great upgrade, and this thread is an awesome resource.
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post #5664 of 7176
Quote:
Originally Posted by zoddan View Post
Ok so this is what i should expect?
Low access time anyway hehe

I was choosing between these drives and WD velociraptor 150GB.
And o took these because 15K RPM and SAS.
Buy a SSD or 2 x SATA or SAS drives in RAID1 for your 2008r2 install. It's a bad idea to be running an OS on a RAID5 array because of the amount of writes an OS does.
post #5665 of 7176
Quote:
Originally Posted by A_Man_Eating_Duck View Post
Buy a SSD or 2 x SATA or SAS drives in RAID1 for your 2008r2 install. It's a bad idea to be running an OS on a RAID5 array because of the amount of writes an OS does.
Have been running RAID 5s for years with OS on and no problem.
post #5666 of 7176
Does anyone know how to run 3TB drive on the Perc 5/i?
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post #5667 of 7176
So I just purchased a Dell PERC 5/i SAS Adapter card with 512MB Cache off eBay.

When I stuck it into my Precision 690 Workstation, the strangest thing happens. I disabled the Integrated (motherboard) SAS Controller in the BIOS, connected two SATA hard drives to the adapter with the supplied cables, did the Control-R trick to access the config screen, and here is what I see:



Notice the very top line of the screen where it says "PERC 5/i Integrated BIOS". I knew right away something was amiss.
I have another Precision 690 Workstation with this exact same PERC 5/i Adapter card, and here is what MY Control-R screen looks like; it reads "PERC 5/i Adapter BIOS"...



My first thought was that maybe the card is defective and is operating in some sort of "pass-thru" mode where the on-board (Integrated) controller chipset is being allowed to control the hard drives connected to the PERC 5/i Adapter card. However, I moved the Adapter card to a completely different machine, and the Control-R screen looks the same.

Could it be that the person who sold me this PERC 5/i card flashed the wrong firmware onto the Adapter card (the FW load for the "Integrated" chipset)?
The odd thing is that it seems to be working (lets me set up and use RAID volumes), but if it is running the FW for the Integrated, I know for sure that it isn't properly using that huge 512MB Cache memory).

Any help or insight would be appreciated.
post #5668 of 7176
hi guys, few question if possible.

i bought a Perc 5i on ebay days ago, included 2x cables SFF-8484 to Sata, 512mb ram and a new BBU with included cable connector.. now i wondering how write cache works.

my setup is a m-ITX at3iont-i Deluxe (Atom based + ION) and 4x Samsung EcoGreen F4 in raid5 array + 1 Kingston SSD for s.o.

when data are written on the array and power is loss of example (write cache enabled) the bbu powers the controller right? so the data are safe stored and can be written on the array, right? but how, coz the array (the 4x Samsung) are powered by the mainboard and so if the power is down the array is down too, how could the Perc save the ram cache on the drives? should i power the 4 disks from Perc connector? like sas cables?

another simple question, how mutch power does the Perc 5i absorb in normal load? someone knows it? i only read on TS that it's 11w tdp, didn't see nothing more infos..

thanks
post #5669 of 7176
Quote:
Originally Posted by pigr8 View Post
when data are written on the array and power is loss of example (write cache enabled) the bbu powers the controller right? so the data are safe stored and can be written on the array, right? but how, coz the array (the 4x Samsung) are powered by the mainboard and so if the power is down the array is down too, how could the Perc save the ram cache on the drives? should i power the 4 disks from Perc connector? like sas cables?
Battery work as UPS for memory stick - for cache only - not for drives and not for the whole controller - you need to power back whole machine - data will be saved from cache - but you should do this ASAP.
post #5670 of 7176
Quote:
Originally Posted by liquidsmoke View Post
Hi,
I'm having some problems with 4x Seagate st2000dl003 in raid5 on a PERC 5i. They are all working perfectly fine, apart from every time I reboot the machine, I have problems with 1 or 2 of the cards not getting detected! Each time this happens I have to reboot until all disks are detected, and then it requires me to re-import the disks and background initialize which takes 8 hours. Sigh!

Any ideas much appreciated. I'm using the latest Dell firmware.
I am having pretty much the exact same issue. Haven't figured out a way around it; tested latest LSI and latest Dell firmwares. Seems like I have to replace the disks. These just doesn't play well with the PERC 5/i. Too bad cause they are cheap and fast.
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