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PERC 5/i RAID Card: Tips and Benchmarks - Page 429

post #4281 of 7276
I removed my non working bbu about a week ago to take a picture of it (couple of pages back). Yesterday all of a sudden my eventviewer showed the following:

Information: Controller ID: 0 Battery Present.
then
Warning: Controller ID: 0 Battery removed.
then
Error: Controller ID: 0 Battery/charger problems detected; SOH Bad.

These messages where generated in 5 seconds..

I mean WT*?, there hasn't been a BBU attached to the Raid adapter for a week..!

I searched around and found a thread on experts exchange which contained the following:

Really appreciate the input.

Spoke with the technical account manager (TAM) at Dell today, after discovering something: the Dell SAS Raid Manager installs something in Services called MRMonitor (for Mega RAID Monitor). This was what was reporting the battery errors. I went into Services and disabled this. No more notifications. According to the TAM at Dell, this makes it likely that the Windows software from Dell/Intel is having issues. He promised to investigate.
============
Heard from Dell today, and this is kind of the last word on the situation: It seems that they have a particularly modified software build for this RAID card that slightly differs, depending on whether it is installed in a server (with a battery), or in a workstation (without a battery). Apparently in the SKU, they called for the software build for servers. Essentially all this did was to enable stuff like the MRMonitor service which would otherwise be shut off. Not sure how to go about turning it off in the RAID software GUI, but that's another issue. In any case, simply turning off the MRMonitor service in Windows Services has discontinued my issue.

I read somewhere in this topic that some guys also got this message and but maybe the hardware is not to blame in all cases..?

Just thought I'd share this information. (my new BBU has arrived so I'm going to give it a try tonight I think..)
Edited by AlphenIT - 4/19/10 at 2:06am
post #4282 of 7276
Well the expensive cables arrived and I now find that I can't use the 5i in the case, because the stick of ram sticks up too high and won't allow the right-angle plugs to fit.

Thankfully I have a 6i card as well, so that fits okay.

Appears that for Server 2003 64-bit, I need to create a (F6) driver disk in order to make the drives visible. I have searched the thread, but can't seem to find where from... would someone please point me to the right place.

Thanks a heap.
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post #4283 of 7276
Well, the random seeks eventually stopped. Apparently it was something the drives themselves were doing and not the controller.


If I'm not mistaken it looks like the controller has a bottleneck? I'm running a array of 3x146Gb Seagate 15k.6's in a Raid 0 array. Normally disk hard drives taper off over the course of the entire read going from the inner edge of the platter to the outter. It doesn't change at all in the HD Tach Graph.

Curiously, I thought it was because WB always disabled itself and WT would enable since I didn't have a BBU. However, after I bought a BBU and installed almost nothing has changed performance wise. I even manually set the controller to WT and then manually set it to WB for separate tests. The only thing that has changed is the cache test now goes to 500 MB/s instead of 300MB/s.

The BBU is showing up in MRM, it isn't giving any errors about switching to WT mode.

RP: Adaptive Read Ahead
WP: Always write back
IO: Cached IO
AP: Read write
DCP: Enabled
BI: Enabled

Are three Cheetahs maxing out the controller as far as sequential reads go? If so I was expecting something more...
LL
LL
LL
Edited by Bensam123 - 4/19/10 at 7:23pm
post #4284 of 7276
For a file server, does anyone have a recommendation for whether RAID 5 or RAID 10 for 4 x 1 TB Hitachi drives would be better? I am thinking that RAID 5 would be better reliability and give me more HD size, but that RAID 10 would be faster. Any thoughts?
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post #4285 of 7276
Quote:
Originally Posted by utnorris View Post
For a file server, does anyone have a recommendation for whether RAID 5 or RAID 10 for 4 x 1 TB Hitachi drives would be better? I am thinking that RAID 5 would be better reliability and give me more HD size, but that RAID 10 would be faster. Any thoughts?
File server means storage size & redundancy.

RAID 5 is the better option. You can loose drives, but still maintain the data, and keep the highest amount of it. possible.

Though, I'd recommend a 5 drive array.
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post #4286 of 7276
Quote:
Originally Posted by utnorris View Post
For a file server, does anyone have a recommendation for whether RAID 5 or RAID 10 for 4 x 1 TB Hitachi drives would be better? I am thinking that RAID 5 would be better reliability and give me more HD size, but that RAID 10 would be faster. Any thoughts?
The answer isn't simple -

For reads (sequential and random), the RAID5 will be faster.

For sequential writes, the RAID5 will be faster.

For random writes, the RAID10 will be faster.

The RAID10 array is slightly more fault tolerant - it can survive up to 2 drives losses (although if 2 specific drives fail it will fail completely), 2 drive failures on the RAID5 will bring down the whole array.

The RAID10 will rebuild much quicker after a drive replacement.

The RAID5 gives more space.

The RAID5 is easier to expand (can add single drives, in RAID10 you must add in pairs).
post #4287 of 7276
Does the PERC5i allow for adding drives from one 4 way connector to the other 4 way connector? Thank you all for the quick replies.

Edit: Also, if I go with 8 drives, is it best to make 1 or 2 spare drives?
Edited by utnorris - 4/24/10 at 1:17am
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post #4288 of 7276
Quote:
Originally Posted by utnorris View Post
Does the PERC5i allow for adding drives from one 4 way connector to the other 4 way connector? Thank you all for the quick replies.

Edit: Also, if I go with 8 drives, is it best to make 1 or 2 spare drives?
Yeah you can add on through either SAS port.

Also, If you're gonna max a full 8 drives, it really won't matter, unless something like a blown PSU takes out your drives, you shouldn't see two dirves go out at once.

The whole point of any RAID level with redundancy is the lack of need for a Backup being contained within that machine. Though, on the enterprise level they always have backups, they're not contained on the machine.
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post #4289 of 7276
i've just noticed there a new firmware been released (7.0.1-0075) on the lsi website, has anyone tried it yet?
post #4290 of 7276
I'm having some pretty serious problems with this card and my ESXi test lab.
I've got a Dell T110 and installed the Perc 5i, flashed with latest LSI (also tried with Dell fw).

I am unable to create or have a stable datastore using ESXi or ESX 3.5 or 4.0, installable or embeded. Each gives similar errors.

If I disable VT-D in the BIOS, everything works. But then I am not able to use 64 bit guests, which is kinda a bummer for a home test lab.

XenServer seems to work fine, but no memory over commit in the free version and limited paravirtualization is kind of a deal breaker.

I've researched the heck out of this problem, and a lot of people are seeing this, with different hardware setups. All with Perc 5i though. I can't imagine every Perc has this problem, and I can't imagine that only a few people have ESX installed with a Perc.

Anyone have any ideas? I've been working on this since October and I'm starting to go insane.
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