Hi Christoph,
We use the DC Toolkit to over-provision PM983 ssd's
[root@pcterm25-1g ~]# ./Samsung_SSD_DC_Toolkit_for_Linux_V2.1 -L
================================================================================================
Samsung DC Toolkit Version 2.1.L.Q.0
Copyright (C) 2017 SAMSUNG Electronics Co. Ltd. All rights reserved.
================================================================================================
-------------------------------------------------------------------------------------------------------------------------------------------
| Disk | Path | Model | Serial |
Firmware | Optionrom | Capacity | Drive | Total Bytes | NVMe Driver |
| Number | | | Number
| | Version | | Health | Written | |
-------------------------------------------------------------------------------------------------------------------------------------------
| 0:c | /dev/nvme0 | SAMSUNG MZQLB1T9HAJR-00007 | S439NE0M100721 |
EDA5202Q | XNUSRG29 | 1788 GB | GOOD | 0.00 TB | Unknown |
-------------------------------------------------------------------------------------------------------------------------------------------
smartctl reports:
Total NVM Capacity: 1,920,383,410,176 [1.92 TB]
converting this to LBA:
1,920,383,410,176 / 512 = 3750748848
based on 960Gb 983DCT example on page 4 of white paper,
estimate 25% OP needed for 3DWPD
0.75 * 3750748848 = 2813061636 (1.34TB)
Set the Capacity:
[root@pcterm25-1g ~]# ./Samsung_SSD_DC_Toolkit_for_Linux_V2.1 --disk 0:c
--nvme-management-namespace --set-lba 2813061636
================================================================================================
Samsung DC Toolkit Version 2.1.L.Q.0
Copyright (C) 2017 SAMSUNG Electronics Co. Ltd. All rights reserved.
================================================================================================
------------------------------------------------------------------------------------------------
Disk Number: 0:c | Model Name: SAMSUNG MZQLB1T9HAJR-00007 | Firmware
Version: EDA5202Q
------------------------------------------------------------------------------------------------
[[ WARNING ]]
Please Note that Set LBA feature feature may change the disk
information and you will lose your data
Please Ensure that data backup is taken before proceeding to Set LBA
feature
If you are sure then only proceed, otherwise restart the application
after taking a backup
Continue Set LBA feature ? [ yes ]: yes
------------------------------------------------------------------------------------------------
[SUCCESS] Namespace Management feature completed successfully
------------------------------------------------------------------------------------------------
[root@pcterm25-1g ~]# ./Samsung_SSD_DC_Toolkit_for_Linux_V2.1 -L
================================================================================================
Samsung DC Toolkit Version 2.1.L.Q.0
Copyright (C) 2017 SAMSUNG Electronics Co. Ltd. All rights reserved.
================================================================================================
-------------------------------------------------------------------------------------------------------------------------------------------
| Disk | Path | Model | Serial |
Firmware | Optionrom | Capacity | Drive | Total Bytes | NVMe Driver |
| Number | | | Number
| | Version | | Health | Written | |
-------------------------------------------------------------------------------------------------------------------------------------------
| 0:c | /dev/nvme0 | SAMSUNG MZQLB1T9HAJR-00007 | S439NE0M100721 |
EDA5202Q | XNUSRG29 | 1341 GB | GOOD | 0.00 TB | Unknown |
-------------------------------------------------------------------------------------------------------------------------------------------
smartctl confirms:
Total NVM Capacity: 1,920,383,410,176 [1.92 TB]
Unallocated NVM Capacity: 480,095,852,544 [480 GB]
Namespace 1 Size/Capacity: 1,440,287,557,632 [1.44 TB]
Best,
Jake
On 15/03/2021 19:44, Reed Dier wrote:
Not a direct answer to your question, but it looks like Samsung's DC Toolkit
may allow for user adjusted over-provisioning.
https://www.samsung.com/semiconductor/global.semi.static/S190311-SAMSUNG-Memory-Over-Provisioning-White-paper.pdf
<https://www.samsung.com/semiconductor/global.semi.static/S190311-SAMSUNG-Memory-Over-Provisioning-White-paper.pdf>
Reed
On Mar 11, 2021, at 7:25 AM, Christoph Adomeit <christoph.adom...@gatworks.de>
wrote:
Hi,
I hope someone here can help me out with some contact data, email-adress or
phone Number for Samsung Datacenter SSD Support ? If I contact Standard Samsung
Datacenter Support they tell me they are not there to support PM1735 Drives.
We are planning a new Ceph-Cluster and we are thinking of Samsung PM1735 NVME
u.2 ssds
Unfortunately the PM1735 is not available with u2 interface but the PM1733 is.
Some manager from Samsung once told me that PM1733 and PM1735 is exactly the
same Hardware, it is only provisioned differently.
But he did not know whom to ask. Any idea of whom I could contact at Samsung or
of how to provision the PM1733 (7.6TB) to a PM1735 (6.4TB) .
I want the provisioning for better DWPD (3DWPD instead of 1DWPD).
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Note: I am working from home until further notice.
For help, contact unixad...@mrc-lmb.cam.ac.uk
--
Dr Jake Grimmett
Head Of Scientific Computing
MRC Laboratory of Molecular Biology
Francis Crick Avenue,
Cambridge CB2 0QH, UK.
Phone 01223 267019
Mobile 0776 9886539
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