Jazsko, Hi, I’m Joe with Dell EqualLogic, First off, VMware doesn’t recommend expanding volumes.  They recommend creating the new larger datastore, then moving the VM’s over to them (vmotion). Also, although its possible, we don’t usually recommend mixing different drive technologies in the same pool (i.e., SAS and SATA) unless it's absolutly necessary.  There are some performance trade off's that would need to be concidered. For the best practices when configuring a storage pool: 1. Do not mix arrays with different drive speeds within a single pool unless they are running a unique RAID policy 2. Do not mix arrays with different drive technologies (SATA, SAS, SSD) within a single pool unless they are running a unique RAID policy. 3. Do not mix arrays with different controller speeds (1GbE, 10GbE) within a single pool unless they are each running unique RAID policies. Take a look at this document for further details: for the best practices when configuring a storage pool:   [URL]  And this one for basic pool design (Section 3.2): [URL]   Regards, Joe
Hi, I have one PS4000 array today, set up with 8x 300 GB SAS disks. This is set up with RAID 50 and 2 hot spare disks. Now I need more diskspace, and since 8 new SAS discs cost almost the same as the new array with 8 SATA discs I decided to buy a new array.  I have devided my volume on the existing EQL into 4 different volumes that are presented to the ESXi hosts in VMware. The new array is going to be set up with RAID 6, will I be able to add the space on EQL2 to the existing volumes on EQL1? How does this work?   Today everything is set up with redundancy, two controllers, 2 switches etc..  Any Idea how much time I'll need to set of for this job?    Any help would be higly appriciated.   Thanks
Two PS4000 Equallogic arrays