Synology HAS5300 - 3.5" Enterprise SAS HDD - 12TB
About Synology Enterprise - 3.5" SAS HDD
Synology's Enterprise SAS Series is a 24/7 enterprise hard drive line designed for SA, HD, and UC chassis where SAS 12 Gb/s connectivity, high write endurance, and dense capacity are required. The lineup spans three sub-series (HAS5300, HAS5310, HAS5320) under a single Enterprise SAS datasheet, with capacities running from 8TB to 24TB. All capacities use CMR recording, 512e sector formatting, persistent write cache, and ship with a 5-year limited warranty.
Specs by Capacity
| Capacity | MPN | Cache | Sustained Throughput | Notes |
|---|---|---|---|---|
| 8TB | HAS5300-8T | 256MB | ~241 MB/s | Legacy |
| 12TB | HAS5300-12T | 256MB | ~254 MB/s | Legacy |
| 12TB | HAS5310-12T | 512MB | ~281 MB/s | Current |
| 20TB | HAS5310-20T | 512MB | ~281 MB/s | Current |
| 24TB | HAS5320-24T | 1GB | ~309 MB/s | Current |
All capacities run at 7,200 RPM, support SAS 12 Gb/s, and carry a 2.5 million hour MTBF and 550TB/year workload rating.
Reliability and Performance
Synology validates each drive on SA, HD, and UC chassis with over 200,000 hours of testing, and the firmware integrates with DSM so RAID rebuilds run faster than against generic SAS drives (Synology reports up to 19% faster). Persistent write cache reduces the chance of corruption on sudden power loss, and DSM-integrated firmware updates land in a single click without taking the drive offline.
Sub-Series Differences
The HAS5300 sub-series is the original generation, with 256MB cache on the 8TB and 12TB. The HAS5310 sub-series brings the 512MB cache and modestly higher sustained throughput, replacing HAS5300-12T at the 12TB tier and adding the 20TB entry. The HAS5320 sub-series tops the lineup with the 24TB capacity at 1GB cache. Synology sells the entire range under one Enterprise SAS umbrella; the prefix differences are largely capacity-tier and generation indicators.
Pick Enterprise SAS vs Enterprise SATA
The Enterprise SAS series is required only for SA, HD, and UC class chassis that use SAS connectivity. For Synology platforms with SATA backplanes (most Plus, FS, RS, and DS class units), the Enterprise SATA series is the equivalent tier with a wider capacity ladder.
Best for: Synology SA / HD / UC deployments needing SAS connectivity, high-availability multi-tenant storage, and RAID arrays where rebuild time is operationally significant.
Avoid if: Your chassis is SATA-only (use the Enterprise SATA series instead).
Market Offers
1 retailer in stockPrices are not shown for listings out of stock more than 7 days.
Affiliate Disclosure: As an Amazon Associate we earn from qualifying purchases. Homelab Prices participates in merchant affiliate programs and may receive compensation for purchases made through links on this site. These relationships do not affect what products, brands, or prices are displayed or the order in which they appear.
Price & Availability: Product prices and availability are accurate as of the date and time indicated and are subject to change. The price and availability displayed on the merchant's website at the time of purchase will apply.
Product Information: Product descriptions, specifications, and images are provided for informational purposes only and are subject to change without notice by the manufacturer or merchant. Homelab Prices does not guarantee the accuracy of product information displayed. Verify all details with the merchant before purchase.