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A free scan shows the junk files, broken settings and background clutter dragging Windows down - then fixes them in one click.Free scan · Windows 10 & 11If a discontinued enterprise SSD no longer fits your NAS build, start with the interface and workload—not the old model number. For a 2.5-inch SATA bay, Kingston DC600M and Samsung PM893a are the closest current 1-DWPD, five-year enterprise-class replacements. Micron 5400 gives you a PRO tier for lighter writes and a MAX tier rated up to 5 DWPD for write-heavy caches and virtual-machine storage. Hardware power-loss protection (PLP), end-to-end data protection and a trustworthy sales channel matter more than peak benchmark speed.
What to buy instead of a discontinued enterprise SSD
The practical replacement path is:
- 2.5-inch SATA NAS bay, mixed or write-heavy use: Kingston DC600M or Samsung PM893a.
- 2.5-inch SATA bay with lighter writes: Micron 5400 PRO.
- 2.5-inch SATA cache, database, container or VM datastore: Micron 5400 MAX, or another current enterprise SATA model with published PLP and endurance figures.
- SAS or NVMe backplane: Do not buy a SATA replacement until the controller, backplane and drive protocol match.
The discontinued Samsung PM1733 family was available in 2.5-inch capacities from 1.92TB to 15.36TB and carried a 1-drive-write-per-day (DWPD) rating for five years. That capacity range and endurance target are useful benchmarks, but the PM1733 name alone does not tell you whether your particular installation uses SATA, SAS or NVMe hardware. Confirm the actual interface before ordering.
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Compatibility comes before endurance
Identify the drive protocol
Read the NAS documentation, backplane label and controller specifications. SATA drives use a SATA controller and connector; SAS drives require SAS-capable hardware; NVMe drives use PCIe lanes and an NVMe backplane or adapter. A SATA SSD cannot replace a SAS or NVMe device merely because it is also 2.5 inches.
Check the physical bay
Verify the supported 2.5-inch height, carrier or caddy, screw positions and hot-swap requirements. Some enterprise carriers accept only a particular thickness or require a vendor-specific tray. Confirm that the NAS firmware recognizes a non-branded drive and that its cooling profile is adequate.
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Match the storage layout
Match capacity to the existing RAID group or ZFS vdev plan. Replacing one member with a smaller drive can block a rebuild even when the advertised decimal capacities look close. Check the NAS documentation for sector-format requirements before mixing drives; do not assume that every enterprise SSD uses the same logical-sector format.
Current enterprise SATA alternatives
| Model/family | Interface and form factor | Endurance information | Power-loss and data protection | Capacity/performance information | Warranty or firmware detail |
|---|---|---|---|---|---|
| Kingston DC600M | 2.5-inch SATA | 1 DWPD for five years; the 1.92TB model is listed at 3,504 TBW | Hardware PLP and enterprise SMART monitoring | Capacity-specific figures vary by model; use the datasheet for the exact SKU | Warranty terms and support period are not stated in the supplied specification; verify current regional terms |
| Samsung PM893a | SATA 6.0Gb/s, 2.5-inch | 1 DWPD for five years | End-to-end data protection and power-loss safeguards | Up to 7.68TB; sequential performance up to 560MB/s read and 530MB/s write | Warranty and firmware-support duration are not stated in the supplied specification; verify before purchase |
| Micron 5400 PRO | Data-center SATA SSD | PRO endurance tier for lighter write workloads; exact DWPD depends on capacity and SKU | Confirm PLP and protection features for the exact 5400 model before ordering | Capacity and throughput vary by SKU | Micron reports a 3-million-hour MTTF for the 5400 family; warranty and firmware term depend on the product listing |
| Micron 5400 MAX | Data-center SATA SSD | MAX tier listed at up to 5 DWPD for write-heavy use | Confirm the exact SKU’s PLP and data-protection implementation | Capacity and throughput vary by SKU | Micron reports a 3-million-hour MTTF for the 5400 family; warranty and firmware term depend on the product listing |
These are replacement classes, not drop-in guarantees. A 2.5-inch SATA model will not provide a solution for an NVMe or SAS deployment, and a higher endurance rating does not compensate for an incompatible controller.
Understanding DWPD, TBW and the workload fit
What 1 DWPD means
One DWPD means the manufacturer rates the drive for writing an amount equal to its usable capacity every day during the stated five-year period. It is a workload rating, not a promise that the SSD will fail immediately after that point. Actual life also depends on write amplification, temperature, garbage collection and the workload’s block sizes.
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For a 1.92TB drive, one drive-wide write per day for five years is approximately 1.92TB × 365 × 5 = 3,504TB. Kingston publishes that exact 3,504TBW figure for the 1.92TB DC600M, showing how the DWPD and TBW figures relate. Use the capacity-specific datasheet value rather than multiplying a marketing capacity yourself when comparing models.
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Choosing PRO versus MAX
A mostly-read media library, backup target or surveillance archive may fit the Micron 5400 PRO tier, provided its exact SKU meets your retention and write requirements. NAS SSD caches, databases, container volumes and VM datastores generate more random and synchronous writes; the 5400 MAX tier’s published rating of up to 5 DWPD gives substantially more write headroom. The correct tier depends on measured daily writes, not the label “NAS.”
Why power-loss protection matters in a NAS
Hardware PLP
Enterprise SSDs with hardware PLP use onboard energy storage to complete in-flight NAND and mapping-table updates when external power disappears. Without PLP, a sudden outage can leave acknowledged writes incomplete or corrupt the translation metadata that maps logical blocks to flash. A UPS reduces outage frequency but does not replace drive-level PLP: a failed power supply, loose cable or controller reset can interrupt power faster than a UPS can respond.
End-to-end data protection
End-to-end protection checks data as it moves through the drive and helps detect corruption between the host interface, controller, DRAM and NAND. Samsung describes the PM893a as providing end-to-end data protection alongside power-loss safeguards. For a VM datastore or database, these protections are more consequential than a small difference in sequential benchmark scores.
When consumer SSDs are a poor substitute
A consumer SSD may work for a read-heavy, noncritical share, but many models omit PLP and provide lower or unspecified sustained-write endurance. Consumer firmware can also prioritize burst benchmarks over consistent latency. If the NAS acknowledges synchronous writes, runs a database, or stores active VM disks, choose a model with published PLP and an endurance rating that covers the measured workload.
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Workload-based buying decisions
Media libraries and backups
Large media files and periodic backups are often read-heavy or sequential. A lower endurance tier can be adequate when daily writes are modest. Prioritize capacity, temperature control, predictable garbage collection and a seller that can document the drive’s origin.
NAS cache
Cache behavior varies by NAS operating system. A write-back cache can amplify writes and make PLP essential; a read-only or write-through cache has a different risk profile. Check the NAS vendor’s cache requirements, then select an enterprise model whose endurance and PLP match the cache mode rather than assuming any SSD is safe.
Databases and containers
Small random writes, fsync operations and frequent metadata updates favor PLP, end-to-end protection and sustained latency. The DC600M and PM893a publish 1-DWPD, five-year enterprise ratings; the Micron 5400 MAX tier is the stronger candidate when measured writes approach several drive capacities per day.
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Virtual-machine datastores
VMs combine random reads, random writes, snapshots and synchronization bursts. Use enterprise PLP, monitor write rates and leave enough free space for garbage collection. If the workload is write-heavy, favor a higher endurance tier even when the average daily write estimate appears acceptable, because bursts and write amplification create additional margin requirements.
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Buying new versus used enterprise pulls
Why used drives can be risky
Used enterprise SSDs may have unknown percentage-used values, power-on hours, media-error history, firmware revisions and remaining warranty. A drive removed from a data center can look clean while having consumed most of its rated write budget. “New old stock” can also carry outdated firmware or a warranty that is not transferable.
Questions to ask a seller
- Is the drive new, refurbished or pulled from service?
- What are the current SMART percentage-used value, total bytes written, power-on hours and media-error count?
- What firmware revision is installed, and can it be updated with the NAS or a separate system?
- Is the stated capacity decimal or binary, and is the sector format compatible with your NAS?
- Who provides the warranty, for how long, and what is the return window if SMART data differs from the listing?
For a production NAS, a current-channel drive with traceable provenance is usually worth more than a cheaper pull whose remaining endurance cannot be verified.
Installation and verification checklist
- Record the existing configuration. Note the NAS model, firmware, controller type, RAID or ZFS layout, drive capacity and sector format.
- Confirm the protocol. Verify SATA, SAS or NVMe on both the backplane and controller. For the candidates in this guide, the required connection is 2.5-inch SATA.
- Verify the carrier and height. Check caddy dimensions, screw positions, hot-swap support and airflow clearance.
- Select the endurance tier. Estimate daily host writes, add margin for write amplification and snapshots, and choose 1-DWPD or higher as appropriate.
- Confirm PLP and protection features. Read the exact SKU datasheet; do not infer PLP from the word “enterprise” alone.
- Check seller data before opening the package. For used drives, obtain SMART health, percentage used, power-on hours, total writes and error counts. Save the listing and serial number.
- Update firmware safely. Check the manufacturer’s current firmware guidance and the NAS compatibility list. Back up data before any firmware operation.
- Install one drive and validate it. Confirm that the NAS reports the expected model, capacity, temperature and link speed before rebuilding or creating a pool.
- Rebuild or create the array according to NAS guidance. Do not mix unknown sector formats or different-size members without checking the documented behavior.
- Monitor after deployment. Watch temperature, media errors, percentage used, total bytes written, latency and rebuild alerts. Set notifications before placing important workloads on the new volume.
Failure modes and fixes
The NAS does not detect the SSD
Recheck SATA versus SAS/NVMe, reseat the carrier, inspect the backplane link and confirm that the NAS firmware supports third-party drives. Test the SSD in a known-compatible SATA system to separate a drive fault from a backplane issue.
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Compare usable capacity and sector format with the existing members. A slightly smaller usable capacity, different logical-sector format or stale metadata can prevent admission. Follow the NAS vendor’s procedure for clearing old metadata only after confirming that the drive contains no needed data.
Best Value
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Latency rises during sustained writes
Check temperature throttling, free capacity, RAID parity activity and cache mode. If the workload exceeds the endurance tier, move write-heavy services to a higher-endurance model such as the Micron 5400 MAX class, or reduce write amplification through snapshot and logging policies.
SMART shows unexpected wear
Stop the rebuild or production workload if a supposedly new drive reports high percentage used, excessive power-on hours or media errors. Capture the SMART report and use the seller’s return process; do not rely on a short burn-in test to erase an unfavorable history.
How the three replacement families differ
The Kingston DC600M is the most directly specified option for a conventional 2.5-inch SATA NAS: its documentation calls out hardware PLP, enterprise SMART monitoring, 1-DWPD endurance and a 3,504TBW figure at 1.92TB. The Samsung PM893a combines a 1-DWPD, five-year rating with capacities up to 7.68TB, SATA 6.0Gb/s connectivity, up to 560/530MB/s sequential read/write and stated end-to-end protection. Micron’s 5400 family is useful when you need to choose endurance by workload: PRO targets lighter writes, while MAX is listed up to 5 DWPD. Micron also reports a 3-million-hour MTTF for the family; MTTF is a population reliability statistic, not a forecast of the service life of one drive.
Use the exact SKU datasheet for capacity-specific TBW, PLP implementation, firmware availability and warranty. Product families can contain multiple capacities and endurance classes, and those details are not interchangeable.
Final selection rule
Buy the highest-endurance, PLP-equipped SATA SSD that your measured workload needs, but only after the NAS protocol, bay and sector format are confirmed. For a normal 2.5-inch SATA homelab NAS, begin with Kingston DC600M or Samsung PM893a for a published 1-DWPD, five-year class. Choose Micron 5400 PRO for lighter writes and Micron 5400 MAX when cache, database or VM writes justify up to 5 DWPD. Treat used enterprise pulls as a separate risk decision: verify SMART history, firmware, provenance and return coverage before they enter an array.
Quick Recap
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