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CA3-8D256-Q11 NVMe LITEON 256GB.C48110B: This is the best SSD before.
PM981 NVMe SED Samsung 1TB.EXA72D2Q: This is samsung drive too.
Specification
Information
Here is some basic information of this SSD in the following table, such as its model name and some identifier.
| ITEM | INFORMATION | PM981 NVMe SED Samsung 1TB.EXA72D2Q |
|---|---|---|
| Vendor ID | Lite-On Technology Corporation (0x14a4) | Samsung Electronics Co Ltd (0x144d) |
| Device ID | 0x2300 | 0xa808 |
| Controller Vendor ID | Marvell Technology Group Ltd. (0x1b4b) | Samsung Electronics Co Ltd (0x144d) |
| Controller Device ID | 0x1093 | 0xa801 |
| Model Number | CA3-8D256-Q11 NVMe LITEON 256GB | PM981 NVMe SED Samsung 1TB |
| Firmware Revision | C48110B | EXA72D2Q |
| PCIe Link | Gen3 x4 | Gen3 x4 |
| L1 substates | Yes | Yes |
| NVMe Specification Version | 1.2 | 1.2 |
| LBA size (byte) | 512 | 512 |
| Capacity (GB) | 256 | 1024 |
| Number of Namespaces | 1 | 1 |
| Maximum Data Transfer Size (KBytes) | 128 | 2048 |
| Write Speed (MB/s, up to) | 810 | 1600 |
| Read Speed (MB/s, up to) | 2300 | 3000 |
| Host Memory Buffer Preferred Size (KBytes) | 0 | 0 |
| Host Memory Buffer Minimum Size (KBytes) | 0 | 0 |
| Write Speed (MB/s, HMB enabled, up to) | 810 | 1600 |
| Read Speed (MB/s, HMB enabled, up to) | 2300 | 3000 |
| page-tag-nand | 3D-TLC | 3D-TLC |
| page-tag-vendor | LiteON | Samsung |
| page-tag-controller | Marvell | Samsung |
| page-tag-form-factor | 2280 | 2280 |
| Warrenty (year) | 5 | 5 |
NVMe hosts and devices communicate commands and completions data in Submittion and Competion Queues. Queue is the most essential data structure defined by NVMe specification.
| INFORMATION | PM981 NVMe SED Samsung 1TB.EXA72D2Q | |
|---|---|---|
| Admin Queue Size | 128 | 128 |
| Maximum Queue Entries Supported | 4096 | 16384 |
| Number of Queues | 16 | 32 |
| Arbitration Mechanism Supported | Round Robin and Weighted Round Robin with Urgent Priority Class Arbitration | Round Robin and Weighted Round Robin with Urgent Priority Class Arbitration |
Supported Commands
List basic device information.
| ADMIN COMMAND OPCODE | COMMAND NAME | PM981 NVMe SED Samsung 1TB.EXA72D2Q |
|---|---|---|
| 0x0 | Delete I/O Submission Queue | Delete I/O Submission Queue |
| 0x1 | Create I/O Submission Queue | Create I/O Submission Queue |
| 0x2 | Get Log Page | Get Log Page |
| 0x4 | Delete I/O Completion Queue | Delete I/O Completion Queue |
| 0x5 | Create I/O Completion Queue | Create I/O Completion Queue |
| 0x6 | Identify | Identify |
| 0x8 | Abort | Abort |
| 0x9 | Set Features | Set Features |
| 0xa | Get Features | Get Features |
| 0xc | Asynchronous Event Request | Asynchronous Event Request |
| 0x10 | Firmware Commit | Firmware Commit |
| 0x11 | Firmware Image Download | Firmware Image Download |
| 0x80 | Format NVM | Format NVM |
| 0x81 | Security Send | Security Send |
| 0x82 | Security Receive | Security Receive |
List basic device information.
| IO COMMAND OPCODE | COMMAND NAME | PM981 NVMe SED Samsung 1TB.EXA72D2Q |
|---|---|---|
| 0x0 | Flush | Flush |
| 0x1 | Write | Write |
| 0x2 | Read | Read |
| 0x4 | Write Uncorrectable | Write Uncorrectable |
| 0x5 | Compare | Compare |
| 0x8 | Write Zeroes | Write Zeroes |
| 0x9 | Dataset Management | Dataset Management |
Thermal
SSD is becoming faster, and then hotter. Fundementally, hot is bad to the data in NAND media, and so it is necessary to control and monitor temperature.
| ITEM | DATA | PM981 NVMe SED Samsung 1TB.EXA72D2Q |
|---|---|---|
| Number of Power States | 5 | 5 |
| Power State #0 | 8.00 W | 7.02 W |
| Power State #1 | 4.50 W | 5.10 W |
| Power State #2 | 3.00 W | 3.50 W |
| Power State #3 | 0.07 W, non operational | 0.08 W, non operational |
| Power State #4 | 0.01 W, non operational | 0.01 W, non operational |
| Thermal Management Temperature 1 (°C) | 76 | -273 |
| Thermal Management Temperature 2 (°C) | 81 | -273 |
Health
SMART data before tests.
| HEALTH ITEM | DATA | PM981 NVMe SED Samsung 1TB.EXA72D2Q |
|---|---|---|
| Composite Temperature (°C) | 42 | 51 |
| Available Spare (%) | 100 | 100 |
| Percentage Used (%) | 32 | 1 |
| Data Units Read (LBA) | 210663880000 | 39261748000 |
| Data Units Write (LBA) | 94842263000 | 26805165000 |
| Host Read Commands | 15313664457 | 809550419 |
| Host Write Commands | 5962689687 | 694796075 |
| Controller Busy Time (minutes) | 15064 | 456 |
| Power On Hours (hours) | 1103 | 68 |
| Power Cycles | 3672 | 29 |
| Unsafe Shutdowns | 159 | 10 |
| Media and Data Integrity Errors | 203 | 0 |