HUS724030ALS640 - 3TB Ultrastar 7K4000 SAS 6Gb/s HDD | HGST/WD
MPN： HUS724030ALS640 ✗ 停產HUS724030ALS640 概覽
A hard disk drive (HDD) is a non-volatile electromechanical storage device that records data on rotating magnetic platters using a moving actuator arm and read/write heads. Within the storage hierarchy, HDDs sit above tape and below SSDs in cost-per-gigabyte terms, providing the highest-density bulk storage tier for capacity-optimized workloads such as cold data archival, backup targets, and hyperscale object stores. The Ultrastar 7K4000 line specifically targets the enterprise-capacity segment where high MTBF, predictable latency, and dual-port SAS redundancy are mandatory for RAID and tiered storage arrays.
Key features of the HUS724030ALS640 include an 8.0 ms average seek time, a 4.16 ms average latency, and 7200 RPM rotational speed, which together yield sequential throughput of approximately 150-170 MB/s for large-block reads. Advanced power modes cut idle power by 59% compared to previous generations, and standby/sleep consumption is rated below 2 W, allowing dense JBOD chassis to operate within their thermal envelope. The drive carries a workload rating of up to 550 TB/year and is rated for 2.0 million hours MTBF.
In its architecture, the HUS724030ALS640 uses a sixth-generation HGST 5-platter mechanical platform with PMR (perpendicular magnetic recording), 512-byte native sector emulation, and a dual-port SAS interface that enables redundant paths to the host. The 6 Gbit/s SAS physical layer is hot-pluggable and supports zoning in expanders, and the drive presents a standard SCSI INQUIRY signature so it integrates with virtually any SAS HBA or RAID controller. Self-encrypting and instant-erase variants exist in the broader 7K4000 family but are not part of this specific ALS640 SKU.
Typical applications include enterprise NAS enclosures, RAID-6 and RAID-10 server arrays, cold-storage object servers, video surveillance retention vaults, and hyperscale capacity tiers where $/TB, MTBF, and SAS dual-port redundancy outweigh the higher IOPS of an SSD. Use cases span from large backup targets to mail spool storage, log retention, and bulk media archives.
When designing with this drive, ensure the chassis backplane provides 6 Gbit/s SAS signaling, the host HBA supports dual-port zoning if you intend to leverage both SAS ports, and the ambient temperature stays within the 5C to 60C operating envelope. Allow at least 8 seconds for the spindle to reach full speed during spin-up; staggered spin-up controllers prevent simultaneous inrush on large chassis.
直接替換替代品，適用於 HUS724030ALS640 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： HUS724030ALS640 （相同外形與佔位） — 差異在於 Capacity, Form Factor, Interface, MTBF, Operating Temperature.
HUS724030ALS641
✅ 直接替換📋 參考替代品（不在目錄中）
HUS724040ALS640
✅ 直接替換📋 參考替代品（不在目錄中）
HUS724020ALS640
✅ 直接替換📋 參考替代品（不在目錄中）
HUS723030ALS640
✅ 直接替換聯絡詢價
查看資料表 →HUS724030ALS640 規格
| Capacity | 3 TB |
| Form Factor | 3.5 inch |
| 介面 | SAS 6 Gb/s (dual-port) |
| Rotational Speed | 7200 RPM |
| Cache Buffer | 64 MB |
| Sector Format | 512n (512-byte native) |
| MTBF | 2.0 million hours |
| Annualized Workload Rating | 550 TB/year |
| Average Latency | 4.16 ms |
| Average Seek Time | 8.0 ms (read), 8.5 ms (write) |
| Platter Count | 5 |
| Recording Method | CMR (Conventional Magnetic Recording, a.k.a. PMR) |
| Power - Standby/Sleep | < 2 W |
| 工作溫度 | 5 C to 60 C |
| Non-Operating Temperature | -40 C to 70 C |
| Dimensions (HxWxL) | 26.1 mm x 101.6 mm x 147 mm |
| Warranty | 5 years limited |
| RoHS 狀態 | Compliant |
| Compliance | SAS-2 (ANSI INCITS 476-2007) |
HUS724030ALS640 腳位配置
| 腳位 P1 | GND — Ground return for drive power |
| 腳位 P2 | GND — Ground return for drive power |
| 腳位 P3 | V5 — +5V supply input (SELV circuit, per WD product manual) |
| 腳位 P4 | V5 — +5V supply input (SELV circuit, per WD product manual) |
| 腳位 P5 | V12 — +12V supply input (SELV circuit, per WD product manual) |
| 腳位 P6 | V12 — +12V supply input (SELV circuit, per WD product manual) |
| 腳位 P7 | SAS_DI_P0 — SAS port 0 differential input, positive |
| 腳位 P8 | SAS_DI_N0 — SAS port 0 differential input, negative |
| 腳位 P9 | SAS_DO_P0 — SAS port 0 differential output, positive |
| 腳位 P10 | SAS_DO_N0 — SAS port 0 differential output, negative |
| 腳位 P11 | Reserved — Not connected per SAS-2 spec |
| 腳位 P12 | Reserved — Not connected per SAS-2 spec |
| 腳位 P13 | SAS_DI_P1 — SAS port 1 differential input, positive |
| 腳位 P14 | SAS_DI_N1 — SAS port 1 differential input, negative |
| 腳位 P15 | SAS_DO_P1 — SAS port 1 differential output, positive |
| 腳位 P16 | SAS_DO_N1 — SAS port 1 differential output, negative |
| 腳位 P17 | Reserved — Not connected per SAS-2 spec |
| 腳位 P18 | Reserved — Not connected per SAS-2 spec |
| 腳位 P19 | GND — Ground return for drive power |
| 腳位 P20 | GND — Ground return for drive power |
典型應用
HUS724030ALS640 適用於 6 應用s: Enterprise RAID-6 Storage Array, Cold-Storage / Archive Tier, Surveillance Video Retention, Hyperscale Object Storage, Enterprise NAS / File Server, Backup Target / D2D Appliance.
Enterprise RAID-6 Storage Array
The HUS724030ALS640 fits RAID-6 arrays because its 7200 RPM spindle, 6 Gb/s SAS dual-port interface, and 2.0 million-hour MTBF meet enterprise reliability thresholds for redundant storage pools. With 3 TB per spindle, a 60-drive chassis delivers 180 TB raw and 150 TB usable after dual-parity overhead. Per the WD Ultrastar 7K4000 datasheet, the drive's 550 TB/year workload rating supports sustained write-heavy backup traffic that RAID-6 typically absorbs. CMR recording keeps rebuild performance predictable compared to SMR alternatives.
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Cold-Storage / Archive Tier
The HUS724030ALS640 is well suited to cold-storage tiers where capacity and $/TB dominate over IOPS. The 3 TB 7200 RPM platform achieves roughly $33 per TB as of 2026-10-14, undercutting SSD archive tiers by an order of magnitude. Per the WD product manual, idle power is reduced 59% versus prior generations, and standby/sleep is below 2 W, so dense JBODs with hundreds of these drives remain thermally manageable. CMR recording avoids the rewrite penalties that plague SMR in backup-rotation workloads.
推薦
Surveillance Video Retention
The HUS724030ALS640 supports surveillance retention vaults that write continuous streams of H.264/H.265 footage from dozens of cameras per chassis. With sequential write throughput of 150-170 MB/s and a 3 TB capacity, one drive can hold roughly 30 days of 30-camera 1080p footage. Per the WD 7K4000 datasheet, the 5-platter CMR design tolerates sequential write workloads that SMR drives cannot sustain. Dual-port SAS allows redundant recording paths to a failover controller, ensuring footage survives controller failure.
推薦
Hyperscale Object Storage
The HUS724030ALS640 is a fit for hyperscale object stores running Ceph, MinIO, or SeaweedFS where the storage node count is high and per-chassis density matters. Its 3.5-inch form factor, 7200 RPM, and SAS dual-port interface align with mainstream object-storage reference designs. Per the WD Ultrastar product manual, idle power reduction translates directly to PUE improvements across 1000+ node fleets. The 5-year warranty matches the typical hyperscale refresh cycle for capacity tiers.
推薦
Enterprise NAS / File Server
The HUS724030ALS640 suits enterprise NAS head units serving SMB and NFS file shares for office workloads. With 64 MB cache and dual-port SAS, multi-user concurrent reads benefit from command queuing across the SAS link. Per the WD 7K4000 manual, the 550 TB/year workload rating covers typical enterprise NAS write amplification from snapshots and replication. CMR formatting ensures predictable write performance for random SMB metadata operations.
推薦
Backup Target / D2D Appliance
The HUS724030ALS640 serves as a disk-to-disk backup target for Veeam, Commvault, or similar backup software. With sustained sequential write throughput of 150-170 MB/s, it can accept backup streams from a single application server or small farm. Per the WD 7K4000 datasheet, the 7200 RPM platform with CMR recording tolerates the continuous sequential write patterns typical of full and incremental backup windows. SAS dual-port provides failover to a secondary backup controller in HA configurations.
推薦
推薦產品摘要
工程參考資料，適用於 HUS724030ALS640 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | HUS724030ALS641 | HUS724040ALS640 | HUS724020ALS640 | HUS723030ALS640 |
|---|---|---|---|---|---|
| Brand | Western Digital (HGST) | Western Digital (HGST) | Western Digital (HGST) | Western Digital (HGST) | Western Digital (HGST) |
| Package / Form Factor | 3.5-inch SAS | 3.5-inch SAS - same | 3.5-inch SAS - same | 3.5-inch SAS - same | 3.5-inch SAS - same |
| Capacity | 3 TB | 3 TB | 4 TB (+33%) | 2 TB (-33%) | 3 TB |
| Interface | SAS 6 Gb/s dual-port | SAS 6 Gb/s dual-port | SAS 6 Gb/s dual-port | SAS 6 Gb/s dual-port | SAS 6 Gb/s dual-port |
| Rotational Speed | 7200 RPM | 7200 RPM | 7200 RPM | 7200 RPM | 7200 RPM |
| Cache Buffer | 64 MB | 64 MB | 64 MB | 64 MB | 64 MB |
| MTBF | 2.0 million hours | 2.0 million hours | 2.0 million hours | 2.0 million hours | 2.0 million hours |
| Sector Format | 512n | 4Kn (different) | 512n | 512n | 512e |
| Generation | 7K4000 (air-filled) | 7K4000 (air-filled) | 7K4000 (air-filled) | 7K4000 (air-filled) | 7K3000 (helium-filled) |
主要差異化特點
- Industry-leading MTBF for its capacity tier (對比HUS724030ALE640 (SATA variant))
- Sixth-generation 5-platter field-proven platform (對比HUS723030ALS640 (7K3000 helium successor))
- Dual-port SAS vs SATA single-port (對比HUS724030ALE640 (SATA single-port variant))
設計說明
The HUS724030ALS640 operates between 5C and 60C ambient. In dense JBOD chassis with 60+ drives, intake air temperature can rise 10-15C above room ambient, so a target intake of 25-35C is recommended to keep drive temps well below the 60C limit. Estimated: at 7200 RPM with continuous random reads, the platters and heads raise internal drive temperature; ensure airflow of at least 8 CFM across each drive bay.
Do not plug a SAS drive into a SATA-only backplane or vice versa. The HUS724030ALS640's SFF-8482 connector and SAS-2 protocol are not electrically compatible with SATA-only ports. Conversely, mixing 512n (640) and 4Kn (641) drives in the same RAID volume will cause alignment errors on some controllers; verify sector format uniformity across all array members before creating volumes. Per WD product manual, no power-on/power-off sequencing is required, but staggered spin-up via the SAS controller is recommended for large chassis.
The 6 Gb/s SAS link requires proper backplane signal integrity; cable lengths in direct-attach configurations should not exceed 10 m per the SAS-2 specification. Use the WD-recommended SFF-8482 to SFF-8088 fan-out cables, and avoid right-angle connectors in high-density layouts. SAS expanders must be SAS-2 certified to support 6 Gb/s fan-out; legacy 3 Gb/s expanders throttle the link.
合規資訊
RoHS compliance per HGST/WD Ultrastar 7K4000 product manual. AEC-Q100 not applicable - HDDs are not automotive-grade semiconductors. SAS-2 ANSI INCITS 476-2007 compliance per product manual section 9.
