In a 3PAR Peer Persistence configuration volumes are synchronously replicated between two 3PAR arrays. For each volume one array acts as primary or source array. This array exports the volume for read/write. The other array acts as secondary or target for replication. For performance reasons it could be an advantage when backup reads data from target array. This is easily possible with Veeam B&R 9.5.
3PAR – does CPG setsize to disk-count ratio matter?
In a 3PAR system it is best practice that setsize defined in CPG is a divisor of the number of disks in the CPG. The setsize defines basically the size of a sub-RAID within the CPG. For example a setsize of 8 in a RAID 5 means a sub-RAID uses 7 data and one parity disk.
Remove a cage from a 3PAR array
To remove a cage from a 3PAR array can be a simple task. But it can also be impossible without help from HPE. Before starting at point 1, you should probably check point 3 first. Generally I would recommend to do any of these steps ONLY when your are very familiar to 3PAR systems! know what you are doing! know what are the consequences of […]
3PAR: Considerations when mixing sizes of same disk type
Generally it is supported to mix disks of different sizes of the same type within a 3PAR system. For example you can use 900GB and 1.2TB FC-disks – within the same cage and even within the same CPG. When a disk fails, HPE sends an replacement disk. Some time ago, stock of 900GB FC disks seem to be empty. So when a 900GB disk fails, […]
Create CPG using Disk Filter
Recently I had to create a new 3PAR CPG using just new added 1.2TB disks. But the system uses already a cage full of 600GB disk. While it was straight forward to change the existing CPG (using 3PAR Management Console) – StoreServe Management Console (SSMC) does not support this feature any more) to use all disk in cage 0, it was not possible to create a […]
Create PSP rule for HPE 3PAR
There are a few best practices when implementing a 3PAR into a vSphere environment. One of these is the creation of a custom PSP-rule. With this set, all 3PAR volumes are automatically configured according to best practices when they get mounted. In this post I will show ways to create this rule. [Update] Because HPE Primera uses same vendor and model description as 3PAR, the […]
Detailed stuff about HP 3PAR
This post includes a lot of detailed information of HP 3PAR storage. Most of the stuff is also true for the new 8000 series. But this post is no introduction to 3PAR. You should know 3PAR terminology to get useful information out of this post.
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