Seagate 3,5" disk drives

You clearly see that SAS is only used for the highest performance requirements. All other fields of operation are taken over by SATA, which is equal in reliability and enterprise features. If you don't need that extra bit of performance, you should consider using SATA drives especially for NAS or cloud storage. SAS drives offer less capacity and are much more expensive (TCO, not counting IOPS).

If you are interested inĀ SSDs, consider the following:
- Compare DWPD (Drive Writes Per Day) to warranty period
- Compare TBW (Terra Bytes Written) to drive size
- Match your workload to endurance option, there are huge price differences

Desktop
http://www.seagate.com/www-content/datasheets/pdfs/desktop-hdd-8tbDS1770-7-1511US-en_US.pdf
up to 8 TB
16-256 MB cache
144-220 MB/s
300,000 load cycles
4.0-7.2 W power in idle mode
2 years warranty

Desktop SSHD
http://www.seagate.com/www-content/product-content/barracuda-fam/desktop-sshd/en-us/docs/desktop-sshd-data-sheet-ds1788-2-1308us.pdf
up to 4 TB
64 MB cache
180-210 MB/s
300,000 load cycles
ca. 6.2 W power in idle mode
3 years warranty

NAS
http://www.seagate.com/www-content/datasheets/pdfs/nas-hddDS1789-5A-1511US-en_US.pdf
up to 6 TB
64-128 MB cache
180-216 MB/s
1,000,000 hours MTBF
2.5-7.2 W power in idle mode
3 years warranty

Enterprise NAS
http://www.seagate.com/www-content/product-content/enterprise-hdd-fam/enterprisenas-hdd/_shared/docs/ent-nas-hdd-ds1841-3-1507us.pdf
up to 8 TB
7200 RPM
128-256 MB cache
216-230 MB/s
1,200,000 hours MTBF
4.5-6.9 W power in idle mode
5 years warranty

Archive
http://www.seagate.com/www-content/product-content/hdd-fam/seagate-archive-hdd/en-us/docs/archive-hdd-ds1834-4-1412us.pdf
up to 8 TB
128 MB cache
180-190 MB/s
300,000 load cycles
800,000 hours MTBF
3.5-5 W power in idle mode
3 years warranty

Terascale (scale-out storage)
http://www.seagate.com/www-content/product-content/constellation-fam/constellation-cs/en-us/docs/terascale-hdd-data-sheet-ds1793-1-1306us.pdf
4 TB
64 MB cache
140-170 MB/s
300,000 load cycles
800,000 hours MTBF
4,59 W power in idle mode
3 years warranty

Kinetic (ethernet interface, object data storage API)
http://www.seagate.com/www-content/product-content/hdd-fam/kinetic-hdd/_shared/docs/kinetic-ds1835-2-1503us.pdf
4 TB
64 MB cache
60 MB/s
800,000 hours MTBF
300,000 load cycles
3 years warranty

Enterprise Capacity (SAS + SATA)
http://www.seagate.com/www-content/product-content/enterprise-hdd-fam/enterprise-capacity-3-5-hdd/constellation-es-4/en-us/docs/ent-capacity-3-5-hdd-8tb-ds1863-1-1508us.pdf
8 TB
7200 RPM
256 MB cache
up to 237 MB/s
2,000,000 hours MTBF
0.44% AFR
9 W power in idle mode
5 years warranty

Enterprise 10K (SAS)
http://www.seagate.com/www-content/product-content/enterprise-performance-savvio-fam/enterprise-performance-10k-hdd/ent-perf-10k-v8/en-us/docs/ent-performance-10k-hdd-ds1785-4c-1505us.pdf
up to 1.8 TB
10,000 RPM
128 MB cache
108-241 MB/s
0.44% AFR
3.88-4.55 W power in idle mode
5 years warranty

Enterprise 15K (SAS)
http://www.seagate.com/www-content/product-content/enterprise-performance-savvio-fam/enterprise-performance-15k-hdd/ent-perf-15k-5/en-us/docs/enterprise-performance-15k-hdd-ds1797-5c-1504us.pdf
up to 600 GB
15,000 RPM
128 MB cache
160-250 MB/s
0.44% AFR
4.8-5.3 W power in idle mode
5 years warranty

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