In this short article I would like to describe different types of DAE (Disk Array Enclosure) that you can meet within the EMC VNX installation. As I described in the previous article disks cna be found in DPE (Disk Processor Enclosure) which is the enclosure that host both Storage Processor and shelf of 25 (2,5″) disks. Of course you can add more disks, with Disk Processor Enclosure.
Types of DAEs available with EMC VNX:
2U in size – 25 drive DAE paired with 2,5″ SAS drives
This enclosure host 25 drives that can be either SAS or SSD disks. Take a look at the front of the 25-drive DAE hosuing 2,5″ SAS drives:
Nothing fancy here, easy access to all the drives with status LEDs that help you indicate the issue with any of the harddisk. Not let’s take a look at the backend:
As you can notice there are two Power Supplies that gives you the opportunity to connect the disk shelf to 2 different power sources. And a close-up to the back of the 25-drive DAE:
3u in size – 15-drive DAE
The 15-drive DAE support 2,5″ SAS, 3,5″ NL-SAS, and 3,5″ flash srives. It may be populated with any combination of those 3. These options enables you to configure your system for optimal efficiency and performance. As you well know:
- flash drives = extreme performence,
- mid-tier SAS drives = good balance of price and perfomence,
- cost-effective NL-SAS drives = capacity up to 2TB per disk.
Again – nothing fancy in the front view. Easy access to all drives, that can be replaced at any time + Status LEDs indicating any issues with disks.
As you can notice there are two Power Supplies that gives you the opportunity to connect the disk shelf to 2 different power sources. Take a look at the closeup of backend:
4u in size – 60-drive DAE
The 60 – drive DAE can be populated with 2.5” SAS drives using a 3.5″ – carrier . The 60 – drive will hold up to 60 rotating or SSD – type drives in 3.5” (EFD, 7200 rpm and 10 K rpm) and 2.5” (EFD, 7200 rpm, 10 K rpm) form factors. For the 3.5” drive types , 15 K rpm drives are not supported in this enclosure.
You can access the disk from the top:
The 60 enclosure may be the first DAE and contain the vault drives ( row A, positions 0 – 3) for the VNX5700 and VNX7500 models. If there is a partially filled row in the DAE, the remaining empty slots will be populated with fillers.