>>
>> > We have been running poweredge 4300 with a mylex extremrRaid 1100
>> > 3 channel controller for about 5 months and I'm very happy about
>> > performance. We have 6 18GB LVD drives partitioned into 16 4GB
>> > partitions with one hot swap spare. The server servers over 100
>> > linux hosts and we haven't have any problem so far.
>> Hi,
>> Do you have any performance results about that mylex extremeraid 1100?
>> It has been offered by our computer+internet provider, but we want
>> to be sure about the performance.
>> Somebody else on this list already tested the ami megaraid elite 1500, which
>> seems to outperform our current ami megaraid enterprise 1400 at least by
>> 400% up to 600%.
>> (Currently using the latest firmware(GH8E)/bios(1.44) revision on the
>> enterprise 1400, and the 1.07b linux drivers).
>>
Here are some iozone numbers (raid 5) for our extremeraid 1100
On local disk,
Writing the 1000 Megabyte file, './aaa'...51.780000 seconds
Reading the file...42.980000 seconds
IOZONE performance measurements:
20250598 bytes/second for writing the file
24396835 bytes/second for reading the file
>From a client over fast ethernet
Writing the 1000 Megabyte file, '/d/dell1v5/aa/aaa'...110.090000 seconds
Reading the file...156.450000 seconds
IOZONE performance measurements:
9524716 bytes/second for writing the file
6702307 bytes/second for reading the file
>> And a general question: what is this connection between the
>> Dell Poweredge raid controllers and ami? People seem to suggest to
>> use the latest 3.* firmware, which does not seem to be an AMI
>> firmware number, or even bios number (AMI does make a difference
>> between firmware and bios revision numbers...)
>>
After struggling for about a month and still couldn't make
the extrmeRaid 1100 work with Poweredge 4400, we ordered
a megaRaid/DC from Dell. Supprisingly, it out perform the
extremeRaid by a factor of 3/2. This is with the megaRaid
driver 1.07 and fimware 3.2?).
Maorong
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