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1282 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

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


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.