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1256 Discussions

set sector/block size in 900P in ubuntu.


I have a intel 900P installed in a Ubuntu 16.04 machine (with nvme 1.0 kernel module loaded by default)

Some of the system information: (it's recognized as 2700... not 900P, I am not sure it's critical or not..)

lifeng@1wk300(x-pheonix:2):~/Workspace/x-phoenix/build$lspci |tail -1

04:00.0 Non-Volatile memory controller: Intel Corporation Device 2700

lifeng@1wk300(x-pheonix:2):~/Workspace/x-phoenix/build$uname -a

Linux 1wk300 4.13.0-38-generic # 43~16.04.1-Ubuntu SMP Wed Mar 14 17:48:43 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

However I saw the output of the fdisk saying it has 512 byte sector size and i/o size

Disk /dev/nvme0n1: 260.9 GiB, 280065171456 bytes, 547002288 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes

So here are some of my questions and doubts:

1. Is there any way to reformat the nvme to 4k sector size? I am assuming I will achieving better performance instead of using 512 block size.

2. I have tried the newest release of nvme-format(from the nvme-cli) . using the default configurations(nvme-format + device name) gives the same blocks/sector size. I also tried to delete the default namespaces(nvme delete-ns) and create a new namespace of 4k size (create-ns), but it failed .. some of the output(the operation code sent by nvme-cli somehow is not correct..):

lifeng@1wk300(x-pheonix:2):~/Workspace/x-phoenix/build$sudo nvme detach-ns /dev/nvme0 --namespace-id=0x1


lifeng@1wk300(x-pheonix:2):~/Workspace/x-phoenix/build$sudo nvme list-ns /dev/nvme0 --namespace-id=0x1

[ 0]:0x209a97b0

[ 2]:0x209a97b0

[ 4]:0x209a97b0

[ 32]:0x2090000

lifeng@1wk300(x-pheonix:2):~/Workspace/x-phoenix/build$sudo nvme list-ns /dev/nvme0

NVMe Status:INVALID_NS(400b) NSID:0

lifeng@1wk300(x-pheonix:2):~/Workspace/x-phoenix/build$sudo nvme id-ns /dev/nvme0 --namespace-id=0x1

NVME Identify Namespace 1:

nsze : 0x209a97b0

ncap : 0x209a97b0

nuse : 0x209a97b0

nsfeat : 0

nlbaf : 0

flbas : 0

mc : 0

dpc : 0

dps : 0

nmic : 0

rescap : 0

fpi : 0

nawun : 0

nawupf : 0

nacwu : 0

nabsn : 0

nabo : 0

nabspf : 0

noiob : 0

nvmcap : 0

nguid : 00000000000000000000000000000000

eui64 : 0000000000000000

lbaf 0 : ms:0 lbads:9 rp:0x2 (in use)

3. I saw someone suggest using intel ssd data center tool. but it seems like it cannot recognize this ssd... perhaps this product is not supported yet?

lifeng@1wk300(x-pheonix:2):~/Workspace/x-phoenix/build$sudo isdct show -a -intelssd

No results


0 Kudos
3 Replies
Community Manager

Hello fengggli,



Thanks for posting in our communities.



Some Intel NVM Express* Drives in the Data Center family support sector size change. However, this is not the case for Consumer/ Enthusiast drives such as the Intel® Optane™ SSD 900P Series. You can find more details in the following article:



- Change Variable Sector Size on NVM Express* Drives



Please let us know if there's anything else we can do for you.



Best regards,


Eugenio F.

Thanks for the explanation.

Actually I do have an application which requires 4k logical sector size. I wonder if there is any tool(device mapper like LVM?) which can wrap the 900P's 512 sector size, and to give a 4k block device interface.

Do you have any suggestions?


Feng Li

Community Manager

Hello fengggli,



Thanks for your reply. As we mentioned before, sector change size is not supported on the Intel® Optane™ SSD 900P Series.



We recommend one of the drives on the Intel® SSD Data Center Family that support sector size change.



Best regards,


Eugenio F.