Category Archives: Naviseccli

Heads Up ! – EMC VNX2 – Potential Data Unavailability

I’m back from the wilderness ! Whenever I see an EMC ETA with the words “Potential Data Unavailability”, I give it immediate attention. Data. Is. Everything. This hot off the press item is titled “ETA 489936: VNX2: A firmware issue may cause certain solid state drives to become faulted, which may result in data unavailability if the drives are part… Read more »

Heads Up ! – EMC VNX1 – Potential Data Unavailability during NDU

First time in a little while, but another EMC TA bulletin arrived in my inbox last week. The inclusion of “potential data unavailability” in the subject got my attention. Full release here This particular bulletin affects only VNX Series 1 Arrays (5300, 5500, 5700 and 7500) that are upgrading to Block OE R32.217 or R32.218. The interesting part is that… Read more »

EMC VNX/MCx Storage Pool Expansion – NavisecCLI or Unisphere

Storage Pool Expansion on EMC VNX/MCx arrays is a simple, straightforward task that can be done to increase capacity, performance or both. It is an online operation (NDU) but I always try to initiate it when load on an array is non-peak. The process is just like a Fast VP data relocation. Of course there’s more than one way to… Read more »

Quick tip – EMC: Certificate issues after NavisecCLI upgrade

Quick tip….. I recently upgraded naviseccli to version 7.33.6.0.96  This is a really quick update so on my dual screen setup, I kicked off the installer in the left monitor while I worked on other tasks on the right. Cool, it’s just Next, next, next right ? Finished in a few minutes. Cue next morning when I noticed that, for only… Read more »

EMC- March Product Update roundup: VNX, VNX2, NaviSECCLI, RecoverPoint, USM

It’s been a busy month for software updates @ EMC. If you subscribe to the various product bulletins, you’d have seen this info, otherwise, READ on ! VNX1 https://support.emc.com/products/12781_VNX1-Series Updated Navisphere CLI (naviseccli), Unisphere Service Manager (USM), Unisphere Host Agent VNX2 https://support.emc.com/products/36656_VNX2-Series Updated Navisphere CLI (naviseccli), Unisphere Service Manager (USM), Unisphere Host Agent New Block OE and File Versions 05.33.000.5.096 / 8.1.3.96″… Read more »

EMC – VNX/2 -Accurately show Storage Pool RAID Drive Counts with Naviseccli

A frequent topic on various EMC forums is how to layout Storage Pools according to EMC best practice, typically regarding about what Drive count to use in the RAID config. The best practice documents* is the source of truth for this when creating pools, but what about when you expand Storage Pools? Of course the recommedation is to only expand… Read more »

EMC MCx FAST Cache : Where’d my Dirty Pages go?

The VNX2/MCx Array release by EMC in 2013 highlighted the whole “multi-core everything” (MCx) software upgrade to make best use of the available CPU cores in the Sandy Bridge Xeon E5 Processors. This allowed for greater parallelism of tasks and big performance improvements across Data services and functions. I’m not going to detail it further here, a) because it’s old… Read more »

EMC VNX/VNX2 – Naviseccli & Powershell – Bulk config changes with ease

GUI’s are generally cool, but when you need to get many of the same/similar tasks done, you can’t beat the speed and ease of using scripts and CLI based tools. I recently had a situation with a EMC VNX2 array where someone (or something) had caused all the LUNs in a RAID Group to become FastCACHE enabled. All 32 of… Read more »

EMC VNX/VNX2/VMAX: 600GB 15k Drive Increased failure rates – with fix.

This is the second time I have had EMA technical advisories recently regarding issues with 15k SAS disks. The first one I wrote about here. It doesn’t sound quite as serious as the last one (OMG, DATA LOSS), but worthy of a look and fix. Details; and full link here and excerpt just below “” EMC Technical Advisory This notification is to… Read more »

EMC VNX – Auto Array Configuration Backups using NavisecCLI and Powershell

Following on from yesterday’s EOY backup topic for ESXi, today I’ll document how to automate the backup of your  VNX & VNX2 Array configurations. As usual, I want this to be automated, set-and-forget and reliable. A combination of NavisecCLI and Powershell works beautifully for this. Without any doubt, the best documentation or config backup tool is the array-config output which is… Read more »