NDCTL-READ-INFOBLOCK(1) | ndctl Manual | NDCTL-READ-INFOBLOCK(1) |
ndctl-read-infoblock - read and optionally parse the info-block a namespace
ndctl read-infoblock <namespace0.0> [<namespace1.0>..<namespaceN.Y>] [<options>]
As described in the theory of operation section of ndctl-create-namespace(1), the raw capacity of a namespace may encapsulate a personality, or mode of operation. Specifically, the mode may be set to one of "sector", "fsdax", and "devdax". Each of those modes is defined by an info-block format that uniquely identifies the mode of operation. The read-infoblock command knows the location (relative to the start of the namespace) and field definition of those data structures.
Note that unlike a partition table info-block is not exposed by default, so the namespace needs to be disabled before the info-block can be accessed.
ndctl disable-namespace namespace0.0 disabled 1 namespace ndctl read-infoblock -j namespace0.0 [
{
"dev":"namespace0.0",
"signature":"NVDIMM_PFN_INFO",
"uuid":"56b11990-66b1-4d91-9cac-ca084c051259",
"parent_uuid":"00000000-0000-0000-0000-000000000000",
"flags":0,
"version":"1.3",
"dataoff":69206016,
"npfns":1031680,
"mode":2,
"start_pad":0,
"end_trunc":0,
"align":2097152
} ]
<namespace(s)>
-V, --verify
-o, --output
-j, --json
-u, --human
-r, --region=
Copyright © 2016 - 2020, Intel Corporation. License GPLv2: GNU GPL version 2 <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
ndctl-create-namespace(1), UEFI NVDIMM Label Protocol <http://www.uefi.org/sites/default/files/resources/UEFI_Spec_2_7.pdf>
2020-12-22 | ndctl |