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3 Posts

10-24-2019

Italy

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ThinkSystem ST50 with RAID 530-8i PCIe 12Gb Adapter

2019-10-24, 14:17 PM

Hi guys, I have a problem with the machine in object, config in RAID1 with 2 SATA drives.

Read/write operations are extremely slow!!

Even in CentOS installation progress, is very very slow, I know that contoller is not fast (no cache support), but is slower than the older generation!!

Someone have the same issue??

Thanks in advance...

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53 Posts

07-20-2015

Brazil

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Re: ThinkSystem ST50 with RAID 530-8i PCIe 12Gb Adapter

2019-10-24, 14:41 PM

Can you quantify that with some benchmark tool such as Blackmagic or ioperf?

Also, which kind of drivers are you using on the server? Please provide the exact model.

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3 Posts

10-24-2019

Italy

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Re: ThinkSystem ST50 with RAID 530-8i PCIe 12Gb Adapter

2019-10-24, 14:52 PM

RAID Controller is this one 7Y37A01082, I can't quantify with benchmark tool, but I install the same OS in an older X3100 and it's twice as fast!!

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106 Posts

06-29-2015

United States of America

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Re: ThinkSystem ST50 with RAID 530-8i PCIe 12Gb Adapter

2019-10-24, 17:38 PM

SAMBUSS,

 

With SATA drives the max bus speed is 6Gb/s, which would be the same than on the X3100 with an old controller. The extra speed on new 12G controllers is applicable to 12G SAS drives.

 

On a RAID 1, write performance should be as fast as the slower of the two drives (data has to be written to both drives), read could distribute the work between drives (double the slower drive at best)

 

I would check the drives are healthy (if one is reporting media errors, timeouts, or something like that, it will severely reduce performance), the disk cache policy and drive FW version (make sure it is a newer version).  Same for the controller, use a new FW version.

 

CentOS is not one of the standard Linux OS supported on this server/controller, find the most comparable RHEL version and use the RAID driver recommended for that. A driver that does not communicate well with the HW can slow things down.

 

Storage is not the only element that can impact performnace . . .

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