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Why P840 or H240 not support 4Kn HDD in Raid mode ,but work for HBA mode

 
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Advisor

Why P840 or H240 not support 4Kn HDD in Raid mode ,but work for HBA mode

I try set a file server with 4 x 6TB SAS 4Kn HDD, it was seagate v5 SAS 12gb interface.

I try use P840 and ML110 Gen9 to get OS and test the HDD,  in HPE SSA, the card fine those 4Kn SAS HDD, and show them as 4Kn group other that SAS HDD.

Snap15.jpgSnap16.jpg

 

I run the diag from SSA, it show some sense feature is 4k raid not support. 

Snap17.jpg

 

I try H240 card too,  when it was HBA mode, HDD could see in the Win 2016 server OS or Esxi 6.7 .

But when I switch H240 to smart array mode , it also show the driver not supprt in raid mode, couldn't set those 4Kn HDD to any Raid 0 or Raid 1 volume.

 

Any one know why the Raid card couldn't support 4K HDD for Raid mode , but support it in HBA mode?

2 REPLIES 2
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HPE Pro

Re: Why P840 or H240 not support 4Kn HDD in Raid mode ,but work for HBA mode

Hi,

Not sure, but seems like controller limitation.

4K native block size is not supported by the controller in RAID mode however in HBA mode drive is directly exposed to OS so it depends on OS whether it support 4Kn blocks or not.

 

But please do check with latest SSA version and Controller firmware, 

Download offline SSA from below link:

https://support.hpe.com/hpsc/swd/public/detail?swItemId=MTX_321a88714bff4279abf175b9bd#tab3

also ensure that controller firmware is updated to latest.

Hope this help!

Regards,

Sudhir

I work for HPE
Accept or Kudo

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Advisor

Re: Why P840 or H240 not support 4Kn HDD in Raid mode ,but work for HBA mode

I already update the two Card fw to least version and My HPE server use least version bios and ssa .