topic Re: 2TB DC P3700 raw NAND size in Solid State Drives (NAND)

2TB DC P3700 raw NAND size

JMorr14 — Sat, 12 Dec 2015 22:14:48 GMT

Hi,

We are using Intel DC P3700 2TB models and was wondering what the raw nand capacity is ?

Everywhere I read states the over provision is 25% but what is this based on ?

If I have the full 2TB capacity available, is there any over provisioning going on ?

Thanks

John

Re: 2TB DC P3700 raw NAND size

Anonymous — Sun, 13 Dec 2015 15:57:16 GMT

Where do you read that it has 25% over-provisioning? I don't see that in its spec: http://www.intel.com/content/dam/www/public/us/en/documents/product-specifications/ssd-dc-p3700-spec.pdf http://www.intel.com/content/dam/www/public/us/en/documents/product-specifications/ssd-dc-p3700-spec.pdf

The sentence "1 sector = 512 bytes or 520 bytes or 528 bytes" intrigued me tho.

Re: 2TB DC P3700 raw NAND size

jbenavides — Mon, 14 Dec 2015 23:39:02 GMT

Hello,

The Intel® SSD DC P3700 and other Intel SSD's have oversubscription space, this is used by the controller for maintenance tasks such as TRIM and garbage collection. So, if your drive has 2 TB addressable by the user, you can be sure it actually has more flash memory built-in for overprovisioning.

At this time we are not able to confirm the information mentioned in the external websites, however, we will check about this and will provide additional information soon.

Note: The Variable Sector Size (512, 520, 528 bytes, etc.) is a feature of Data Center drives like the Intel® SSD DC P3700, it allows the user to format the SSD using a determined sector size to improve compatibility with some environments. This should not have any effect in the addressable capacity, VSS is available since some systems may work better with a specific sector size.

Re: 2TB DC P3700 raw NAND size

jbenavides — Fri, 18 Dec 2015 00:35:46 GMT

Hello Vmlinux,

We checked about your inquiry and received confirmation from engineering that 25% over-provisioning is an accurate value for the Intel® DC P3700 Series, including the 2TB model.