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PERC 5/i RAID Card: Tips and Benchmarks - Page 459

post #4581 of 7194
Quote:
Originally Posted by BLinux View Post
smartmontools, and the smartctl command in Linux is indeed able to access SMART data of the individual drives behind a PERC5/6 card as of version 5.39 and above. However, I've never seen an option to "write" to the firmware of the drive, and hence set the ERCc/CCTL/TLER timeout value.

i think it is much easier just to buy enterprise grade drives.... no? they are not that much more expensive if you know where to shop, and you get longer warranty, TLER, etc...
I saw a forum post somewhere regarding the setting of CCTL/TLER using SMART commands using smartmontools... having trouble tracking it down again.

2TB RE4 drives are in the $250 range while 2TB desktop drives can be had for around $100... Multiply that by a few drives and its a pretty significant savings. I'm somewhat of a cheapskate, as evidenced by my shoebox pc.
    
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post #4582 of 7194
Quote:
Originally Posted by bamjonut7 View Post
The firmware is the same for both.
I have always used the LSI firmware for my 6E and the 1078 family of their firmwares all use the same release file.

I've been using 6E for almost 2 years now and have owned many 5i's in the past.
Whether the file is the same or not is irrelevant - the firmware on the 2 devices is different.

Attach a PERC 6/e to an expander, and it will address more than 8 drives (not sure how many, I have only seen 16 tested). Hook up a 6/i, and it will only see the first 8 drives regardless of how many you connect.
post #4583 of 7194
Quote:
Originally Posted by the_beast View Post
Whether the file is the same or not is irrelevant - the firmware on the 2 devices is different.

Attach a PERC 6/e to an expander, and it will address more than 8 drives (not sure how many, I have only seen 16 tested). Hook up a 6/i, and it will only see the first 8 drives regardless of how many you connect.
It's true, the firmware is different. Not only that, although the PERC's are based on the LSI reference design, they may not be 100% identical. The reason I say this is because I've spoken with LSI and Dell engineers, and LSI told me that even though the PERC controllers are based on their chip, the actual circuit design of the card is the intellectual property of Dell. To me, this means that Dell didn't just take an LSI card and re-branded it. They either designed it themselves (based on the reference design) or hired someone to do it, either way, they actually own the intellectual property of that design.

I know using a PERC 6/E card with an MD3000 (which has 15 drives), one can expand the MD3000 with at least 2 more MD1000 in a daisy chain configuration. So, I do think it is likely that the PERC 6/E can control more than 16 drives, although it may require additional intelligence that is in the controller modules of the MD3000. The MD1000 controller modules are simply 4-way multipliers for each SAS lane (there are 4 lanes in the Infiniband cable), making 4x4=16 lanes for 16 drives. The MD3000 must be doing something "extra", but I haven't had the chance to dissect one yet.
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post #4584 of 7194
Quote:
Originally Posted by the_beast View Post
Whether the file is the same or not is irrelevant - the firmware on the 2 devices is different.

Yes granted but my point was originally in reply to someone mentioning if it was possible to flash a 6e with 6i firmware or not.

And the perc 6e will support up to 192 drives with expanders I believe
post #4585 of 7194
Quote:
Originally Posted by bamjonut7 View Post
Yes granted but my point was originally in reply to someone mentioning if it was possible to flash a 6e with 6i firmware or not.

And the perc 6e will support up to 192 drives with expanders I believe
That post was by me as well.

If you play around with the hardware IDs of the cards you *may* be able to force the 'e' firmware to be written to the 'i' hardware. This may work and give you expander support on the 6/i, the updater may fail to write the firmware or you may brick the card completely.
post #4586 of 7194
My point was that there aren't 2 different firmware files available to be able to cross flash them.
Download a flash file from dell for each controller and compare them and you will see what I mean, there are only a small number of differences in the header, not enough to give the two files major differing features.
post #4587 of 7194
I would like to share this in case anyone has this problem:

If your RAID5 (or other redundant array fails) to rebuild, then fails to import the foreign configuration, don't panic! I got an error 0xc when failing to import (in the BIOS), so I thought all was lost. However I tried the following, and it worked like a charm:


1) Delete the virtual disk. Don't worry, this isn't a destructive process, it just makes the controller forget about checking the disk on boot, the parity data is still written to the disks.

2) Clear the foreign configuration by pressing F2>Foreign>Clear foreign configuration when over the Controller section in the BIOS. Again this is not a destructive process.

3) Press F2 in the Controller section, then create new VD. If you use the same stripe size (and maybe order, not sure if that one matters, maybe it can detect the order) then you should be good. After hitting Finish it will tell you that you should initialize the array unless you're trying to reconstruct an array. The latter is what you're trying to do, so DO NOT INITIALIZE THE ARRAY!

3) Press Esc twice and leave the menu, then press ctrl+alt+del to reboot. After POST and the Perc array check screen you should be able to see that the drive is optimal, then you should see it in your OS.


I just brought back a 5*500GB RAID5 array this way. I noticed that someone else in this thread had the exact same problem, and it didn't really look like it ended well for him, so hopefully if anyone else finds this via google or any other way it will help them.
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post #4588 of 7194
Quote:
SMBus Issue with Intel Chipsets

These cards are known to have some compatibility issues with Intel chipsets. However, they are known to work with NVIDIA motherboards fine. The issue stems from a System Management Bus (SMBus) conflicting with the motherboard's memory detection. SMBus is simple signal to provide the motherboad some basic device information and control. Symptoms of the conflict includes improperly reported RAM sizes and POST errors.

The trick is just to physically disable the SMBus signal. It is composed of just two pins B5 (SMCLK, SMBus clock) and B6 (SMDAT, SMBus data). These two pins need to be covered by tape or nail polish. On the top side of the card, they are the 5th and 6th PCIe pins from the left. You can see the pins covered as seen below:
A big thanks to DuckieHo for the SMbus fix as i was going crazy with my ram not getting detected properly. The fix also works for the H700 as well.
post #4589 of 7194
What does it mean if you have a constantly blinking green light on the Perc 6? does that mean normal operation? I just noticed it even though my card seems to be working fine.
post #4590 of 7194
Quote:
Originally Posted by mark076h View Post
What does it mean if you have a constantly blinking green light on the Perc 6? does that mean normal operation? I just noticed it even though my card seems to be working fine.
Green blinking light is normal.
    
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