vSphere 5.5

vSphere 5.5, RDMs and Microsoft Clustering

I was having a conversation with one of our tech support guys (Greg Williams) recently about the relaxation on the requirement to allow Raw Device Mappings [...]

Heads Up! SW iSCSI, hostd and ESXi 5.5 U1 Driver Rollup ISO

My good pal Duco Jaspars pinged me earlier this week about an issue that was getting a lot of discussion in the VMware community. Duco also pointed me to a [...]

A closer look at vSphere Flash Read Cache – vFRC

I was going to make this part 11 of my vSphere 5.5 Storage Enhancements series, but I thought that since this is such a major enhancement to storage in vSphere [...]

vSphere 5.5 Storage Enhancements Part 10 – 16Gb E2E FC Support

A short and sweet post today. In vSphere 5.0, VMware introduced support for 16Gb FC HBAs. However these HBAs had to be throttled down to work at 8Gb. In 5.1, [...]

vSphere 5.5. Storage Enhancements Part 9 – PDL AutoRemove

We at VMware have been making considerable changes to the way that the All Paths Down (APD for short) and PDL (Permanent Device Loss) conditions are handled. [...]

vSphere 5.5 Storage Enhancements Part 8 – DSNRO Changes

This is a topic which has been discussed time and time again. It relates to an advanced storage parameter called Disk.SchedNumReqOutstanding, or DSNRO for [...]

vSphere 5.5 Storage Enhancement Part 7 – LUN ID/RDM Restriction Lifted

About a year ago I wrote an article stating that Raw Device Mappings (RDM) continued to rely on LUN IDs, and that if you wished to successfully vMotion a [...]