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тАО02-23-2006 09:16 PM
тАО02-23-2006 09:16 PM
ML350G4p + P600 SLOOOOOOOWWWWWW
The P600 is attached to 6 SATA 250GB drives.
I have a problem where the drives attached to the P600 are terribly slow at writing.
I get great results reading from the array but no matter what RAID type, the writes are always slow.
e.g. 1 Disk RAID0 gives me writes of 7MB/s, 2 Disk RAID0 = 10MB/s, 3 Disks RAID5 = 14 MB/s
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тАО02-26-2006 11:28 PM
тАО02-26-2006 11:28 PM
Re: ML350G4p + P600 SLOOOOOOOWWWWWW
That is really slow! You have mentioned about 6 SATA drives --- are they all linked together? I think the spec doc mentioned about upto 4 devices for a channel without expander.
Thanks,
Gus
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тАО02-26-2006 11:37 PM
тАО02-26-2006 11:37 PM
Re: ML350G4p + P600 SLOOOOOOOWWWWWW
I've had the P600 replaced with no difference from the new one. Installing Fedora Core 4 also produces similar slow performace.
Read performance however is superb and exactly as I expect.
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тАО02-27-2006 02:29 AM
тАО02-27-2006 02:29 AM
Re: ML350G4p + P600 SLOOOOOOOWWWWWW
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&taskId=110&prodSeriesId=466290&prodTypeId=329290&prodSeriesId=466290&objectID=c00564367
What is your firmware version number?
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тАО02-27-2006 02:33 AM
тАО02-27-2006 02:33 AM
Re: ML350G4p + P600 SLOOOOOOOWWWWWW
Already read that doc, doesn't apply.
If I attach two of the drives to the motherboards SATA socket and get windows to stripe them, I get ~120MB/s read and write.
This is true whether the drive cage is involved or if the SATA drives are attached directly.
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тАО02-27-2006 02:47 AM
тАО02-27-2006 02:47 AM
Re: ML350G4p + P600 SLOOOOOOOWWWWWW
Can you confirm the part number of the cable between the drive cage and P600 has "389662-B21" printed on it?
If you bought P600 separately you need to buy two optional SAS cables.
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тАО02-27-2006 03:02 AM
тАО02-27-2006 03:02 AM
Re: ML350G4p + P600 SLOOOOOOOWWWWWW
The SAS-SAS cable connects the P600 to the drive cage and has the same connector on both ends with an id of 361316-007
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тАО02-27-2006 03:12 AM
тАО02-27-2006 03:12 AM
Re: ML350G4p + P600 SLOOOOOOOWWWWWW
http://h20000.www2.hp.com/bc/docs/support/SupportManual/c00310097/c00310097.pdf?jumpid=reg_R1002_USEN
I hope this will solve your problem! If it does, don't forget to assign points! ;)
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тАО02-27-2006 03:15 AM
тАО02-27-2006 03:15 AM
Re: ML350G4p + P600 SLOOOOOOOWWWWWW
361316-007, 3889953-001 and 389662-B21
Above codes appear to be the same cable (SAS to SAS multilane)
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&objectID=c00357508&jumpid=reg_R1002_USEN
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тАО02-27-2006 03:26 AM
тАО02-27-2006 03:26 AM
Re: ML350G4p + P600 SLOOOOOOOWWWWWW
http://partsurfer.hp.com/cgi-bin/spi/main?sel_flg=modsrch&template=main&cpric=&prodsrch=SAS+CABLE
Hope this helps!