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PERC 5/i RAID Card: Tips and Benchmarks - Page 322

post #3211 of 7194
SOLUTION
Windows 7 performance

I installed Windows 7 (original, from an MSDNAA subscription).
The file copy performance was dropped from 100+MB/sec to 30MB/sec.

The solution is simple:
Go to the device manager->Disk drives
There is one "DELL PERC 5/i SCSI Disk Device" for each virtual disk.
Right click the first one->properties->Policies->check the "Turn off Windows write-cache buffer flushing" option.
Repeat for each virtual disk.

SOS SOS SOS SOS
Do not check this option if you do not have a BBU or a UPS.You may lose important data in case of a power failure.
Edited by sdim - 9/11/09 at 11:33pm
post #3212 of 7194
Picked up a card from Ebay. Have it in a Asus P6T motherboard with a Intel Core i7 and 6 gig ddr3 ram.

Didn't need to mod the card. Picked up find and the drives were okay.
Have attached a Battery and 246 meg ram. All seems okay. I have since modded the card but no difference.
I have attached a 400gig SAS disk @ 15k and a 160 gig Sata disk. Seperate cables due to different plugs.

Issues.
ESX. sees the card fine however struggles to create a VMFS and when it does the volume keeps dropping off.
Now running Windows 7 on the machine. Create 2 single disk volumes. No issues and initialised okay.

Windows installed fine and runs all day happy as expect.
On the occasionaly startup the windows mach blue screens. Disk issues. No issues once running.
Occasional restarts (Cold boot or restart) the card complains that there are no config. Occasionally mentions a foreign config and other times can't even see the disk. REstart. See's it again. Import foreign disk then reboot. All okay.

Question is. What could be causing this.
Faulty disks, Cables, Ram, BBu or actual card??
I have eliminated the disk and cable as the sata also has similar issues.
I have flashed latest Dell and one of the latter LSI. Same issue. No difference. Currently running the older latest Dell versus the new LSI.

Default windows 7 drivers.

Quite happy to buy another card however don't want to waste money if the issue is elsewhere?
post #3213 of 7194
Have a Perc 5/i with 7 1.5TB Samsung EcoGreen cards. Problem is the following:

On PD5 I get the following errors:
Sense error and a timeout error

After a while the physical disk "drops" out of the array but then start rebuilding immediatley everything is fine again. This problem happened a few times. I'm busy testing each drive on it own to see what is going on (smart and surface test on the onboard controller).

My questions are:
1. Can a lack of power cause this and what is the change that it happens on 1 drive only?
2. Can it be a faulty cable that cause these errors?
3. What else can it possible be?
4. Is there any software to test the individual drives while configured in a Raid 5 array on a Perc 5/i?

Thank you for any help or advice.
post #3214 of 7194
Quote:
Originally Posted by RobiNet View Post
I think:
DELL PERC 5/i = LSI MegaRAID SAS 8408E = Intel® RAID Controller SRCSAS18E

and from Intel SRCSAS18E spec:

Processor:
Intel® IOP333 I/O processor operating at 500MHz with hardware XOR
Memory:
Includes 256MB of Registered ECC DDR2 400MHz SDRAM (with support for up to 1GB)


and photos - PCB looks identically:

Intel SRCSAS18E:


LSI 8408E:


so there is question - is there 512mb limit for cache size on DELL PERC 5/i as result of DELL's implementation ? or - like BLinux noticed - only wrong memory modules was tested ?

maybe somebody who have Intel or LSI cards and can check this ... or ... maybe somebody will try to flash PERC 5/i with Intel's firmware
I just flashed the Perc 5/i with the Intel firmware (last time I flashed the LSI firmware).
I reboot the machine, it works fine.
Minor changes, lower CPU Usuage.
Important!!! : If you upgrade from an older to a newer firmware, it will work fine.
If you DOWNGRADE to an older firmware, the virtual disks will be lost. DO NOT do anything (create/initialize disks), or you may lose your data. You have to install the newer firmware again and everything will work fine.
post #3215 of 7194
Does the intel firmware allow SMART monitoring of the disks? is there a pass-through or jbod mode that makes a raw disk accessible to the system without having to create single disk RAID-0 volumes?
post #3216 of 7194
Quote:
Originally Posted by cartman123 View Post
Does the intel firmware allow SMART monitoring of the disks? is there a pass-through or jbod mode that makes a raw disk accessible to the system without having to create single disk RAID-0 volumes?
With LSI firmware (have not tested yet with Intel), I created a new raid-0 volume with only one disk. SURPRISE!!! All my files were there, the disk was not erased.
post #3217 of 7194
Thread Starter 
Quote:
Originally Posted by ara View Post
Have a Perc 5/i with 7 1.5TB Samsung EcoGreen cards. Problem is the following:

On PD5 I get the following errors:
Sense error and a timeout error

After a while the physical disk "drops" out of the array but then start rebuilding immediatley everything is fine again. This problem happened a few times. I'm busy testing each drive on it own to see what is going on (smart and surface test on the onboard controller).

My questions are:
1. Can a lack of power cause this and what is the change that it happens on 1 drive only?
2. Can it be a faulty cable that cause these errors?
3. What else can it possible be?
4. Is there any software to test the individual drives while configured in a Raid 5 array on a Perc 5/i?

Thank you for any help or advice.

The issue is probably with the drives themselves. It sounds like a "Command Completion Time Limit (CCTL)" error.


http://en.wikipedia.org/wiki/Time-Li...Error_Recovery
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CPUMotherboardGraphicsRAM
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Intel X25-M 160GB + 3xRAID0 500GB 7200.12 Window 7 Pro 64 Acer H243H + Samsung 226BW XARMOR-U9BL  
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post #3218 of 7194
Quote:
Originally Posted by DuckieHo View Post
The issue is probably with the drives themselves. It sounds like a "Command Completion Time Limit (CCTL)" error.


http://en.wikipedia.org/wiki/Time-Li...Error_Recovery
I have the computer up and running again. The exact errors are:
Unexpected sense which is then followed by
Corrected medium error during recovery and then sometime the
Command timeout error

I have tested the drive that is giving the problem plus another one and not errors. It also alway was only the 1 drive. I connected it for now on the spare SATA cable and is doing a consitency check.

If it is the above is there anything I can do about it?
post #3219 of 7194
Quote:
Originally Posted by sdim View Post
With LSI firmware (have not tested yet with Intel), I created a new raid-0 volume with only one disk. SURPRISE!!! All my files were there, the disk was not erased.
I also tried this solution, but I had a very bad surprise.
I done this with 2 HD, 1.5TB each.
I copied all the data before to attach them to the perc and the file system was correct (I copied all the files without problem).
When I discovered that the FS was intact after the connection to the perc, I was happy. But when I tried to copy the files from the HD to another, I discovered that was impossible to read all the big files (more that 2 GB), and this on both HD.

I had to destroy and recreate the partition. After that, all was ok.
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My System
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CPUMotherboardGraphicsRAM
2xQuadCore Intel Xeon E5420 Tyan Tempest i5400XT GTX 660 Ti 16GB 8xSamsung M395T5750 FBDIMM 
Hard DriveOptical DriveOSMonitor
16 Internal, 16 external. Mainly Seagate LG GGW-H20L + GH22NP20 Windows 7 Ultimate x64 ASUS PB278Q 
KeyboardPowerCaseMouse
Corsair Vengeance K95 Enermax Galaxy 1000W EGA1000EWL Chieftec (modified) Logitech G500 
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post #3220 of 7194
I think that probably happened because the controller chops a few hundred MB off the end of the device. NTFS filesystems usually mount ok but file operations are very problematic, while linux filesystems do not even manage to get mounted.
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