[archive] SSD overview

[zhihao]

refer to http://rar.shufangkeji.com:60380/showthr...5#pid44495

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This board is for SSD related parts

Modern SSDs may have volatile and non-volatile cache, and this is perhaps related to PLP (power loss protection) which should be present on "enterprise" SSDs. The volatile cache is perhaps vulnerable to power loss, but the non-volatile cache should survive power loss, at least in theory. We may use hd-/sdparm/smartctl command to switch such caches on or off.

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20220128/lingu: link plp

[lingu]

Modern SSDs may have volatile and non-volatile cache, and this is perhaps related to PLP (power loss protection) which should be present on "enterprise" SSDs. The volatile cache is perhaps vulnerable to power loss, but the non-volatile cache should survive power loss, at least in theory. We may use hd-/sdparm/smartctl command to switch such caches on or off.

[lingu]

There is already an overview for ssds -- http://rar.shufangkeji.com:60380/showthr...p?tid=9219

i am merging info there and archiving this one. Make sure to FAIRR before creating a new item.

[yijun]

Code:

[root@gm982-1 ~]# nvidia-smi
Thu Mar 20 16:37:51 2025
+---------------------------------------------------------------------------------------+
| NVIDIA-SMI 535.129.03             Driver Version: 535.129.03   CUDA Version: 12.2     |
|-----------------------------------------+----------------------+----------------------+
| GPU  Name                 Persistence-M | Bus-Id        Disp.A | Volatile Uncorr. ECC |
| Fan  Temp   Perf          Pwr:Usage/Cap |         Memory-Usage | GPU-Util  Compute M. |
|                                         |                      |               MIG M. |
|=========================================+======================+==============​​========|
|   0  NVIDIA GeForce RTX 4090        Off | 00000000:01:00.0 Off |                  Off |
| 45%   38C    P0              55W / 450W |      2MiB / 24564MiB |      0%      Default |
|                                         |                      |                  N/A |
+-----------------------------------------+----------------------+----------------------+
|   1  NVIDIA L40                     Off | 00000000:41:00.0 Off |                    0 |
| N/A   40C    P0              89W / 300W |      4MiB / 46068MiB |      3%      Default |
|                                         |                      |                  N/A |
+-----------------------------------------+----------------------+----------------------+

+---------------------------------------------------------------------------------------+
| Processes:                                                                            |
|  GPU   GI   CI        PID   Type   Process name                            GPU Memory |
|        ID   ID                                                             Usage      |
|===============================================================================​​========|
|  No running processes found                                                           |
+---------------------------------------------------------------------------------------+
[root@gm982-1 ~]#