Comments on: USP-V – bit of a let down? http://thestoragearchitect.com/2007/05/15/usp-v-bit-of-a-let-down/ Storage, Virtualisation & Cloud Wed, 16 May 2012 18:04:04 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: Chris M Evans http://thestoragearchitect.com/2007/05/15/usp-v-bit-of-a-let-down/#comment-72 Chris M Evans Wed, 16 May 2007 05:55:00 +0000 http://thestoragearchitect.wordpress.com/2007/05/15/usp-v-bit-of-a-let-down/#comment-72 Nigel, thanks for the comments - as you mention, the detail would be good. Nigel, thanks for the comments – as you mention, the detail would be good.

]]> By: Nigel http://thestoragearchitect.com/2007/05/15/usp-v-bit-of-a-let-down/#comment-71 Nigel Tue, 15 May 2007 22:01:00 +0000 http://thestoragearchitect.wordpress.com/2007/05/15/usp-v-bit-of-a-let-down/#comment-71 Hi Chris,<br/><br/>I mentioned in post over at RM that I thought this was a good upgrade. But if I dreamt up the wider backend striping then that would take a lot of the gloss off it for me.<br/><br/>As for the 224 front end ports now supported. Im pretty sure that HP always supported 224 on the XP12K (with only a single ACP pair installed).<br/><br/>As for the increased number of ACP/DKA/BED pairs to 8. My understanding is that there are still only 64 paths on the back end and the same number of processors as on BEDs on the original USP. They have simply halved each PCB to make incrementing and maintenance simpler. So if you pull and ACP now you affect less drives.<br/><br/>But Im like you - lacking the technical documentation to know for sure. Hi Chris,

I mentioned in post over at RM that I thought this was a good upgrade. But if I dreamt up the wider backend striping then that would take a lot of the gloss off it for me.

As for the 224 front end ports now supported. Im pretty sure that HP always supported 224 on the XP12K (with only a single ACP pair installed).

As for the increased number of ACP/DKA/BED pairs to 8. My understanding is that there are still only 64 paths on the back end and the same number of processors as on BEDs on the original USP. They have simply halved each PCB to make incrementing and maintenance simpler. So if you pull and ACP now you affect less drives.

But Im like you – lacking the technical documentation to know for sure.

]]>