Alternative to 310504-B21: Better-Value Equivalents in Stock
Comparing the 310504-B21 (310504-B21 - Compaq 73 GB 3.5 Internal Hard Drive - 1 Pack - Ultra320 SCSI - 10000 rpm) against alternatives? Pro Disk Network stocks 12 similar parts that offer comparable performance at different price points. Each option below is in-stock, US-warehoused, and tested-and-certified before ship. Bulk pricing is available on quantities of 5+; B2B procurement can use Net 30 with PO.
About the 310504-B21
| SKU | 310504-B21 |
|---|---|
| Product | 310504-B21 - Compaq 73 GB 3.5 Internal Hard Drive - 1 Pack - Ultra320 SCSI - 10000 rpm |
| Current price | $617.50 |
| Stock status | In Stock |
| Detail page | View 310504-B21 › |
Alternatives to 310504-B21
Each part below is currently in our US warehouse, ships same-day for orders before 2pm ET, and includes our 90-day warranty. SKUs link to the full product page with photos, datasheets and B2B quote form.
KU073L8 - Maxtor Atlas 10K III 73.40 GB 3.5 Internal Hard Drive - 1 Pack - Ultra320 SCSI - 10000 rpm - 8 MB Buffer
SKU: KU073L8
Price: $80.72
91.AB033.061 - Acer 73 GB 3.5 Internal Hard Drive - 1 Pack - Ultra320 SCSI - 10000 rpm
SKU: 91.AB033.061
Price: $216.95
SO.07310.CS2 - Acer 73 GB Internal Hard Drive - 1 Pack - Ultra320 SCSI - 10000 rpm
SKU: SO.07310.CS2
Price: $216.95
KW073L8 - Maxtor Atlas 10K III 73.40 GB 3.5 Internal Hard Drive - 1 Pack - Ultra160 SCSI - 10000 rpm - 8 MB Buffer
SKU: KW073L8
Price: $364.50
06P5752 - IBM 73.40 GB 3.5 Internal Hard Drive - 1 Pack - OEM - Ultra160 SCSI - 10000 rpm - 8 KB Buffer
SKU: 06P5752
Price: $473.68
MAS3735NP - Toshiba Enterprise MAS3735 73.50 GB 3.5 Internal Hard Drive - 1 Pack - Ultra320 SCSI - 15000 rpm - 8 MB Buffer
SKU: MAS3735NP
Price: $478.49
272673-B21 - Compaq 36.40 GB 3.5 Internal Hard Drive Ultra320 SCSI 15000 rpm
SKU: 272673-B21
Price: $357.89
S26361-F3208-E573 - Fujitsu S26361-F3208-E573 73 GB 2.5 Internal Hard Drive - 1 Pack - 3Gb/s SAS - 15000 rpm - 8 MB Buffer - Hot Pluggable
SKU: S26361-F3208-E573
Price: $432.36
E20S5P7U - Toshiba E20S5P7U 73 GB 3.5 Internal Hard Drive - 5 Pack - 3Gb/s SAS - 15000 rpm - Hot Swappable
SKU: E20S5P7U
Price: $432.36
E20S4P7U - Toshiba E20S4P7U 73 GB 3.5 Internal Hard Drive - 4 Pack - 3Gb/s SAS - 15000 rpm - Hot Swappable
SKU: E20S4P7U
Price: $432.36
How we pick alternatives
Every recommendation above was selected using these criteria:
- Spec parity — capacity, speed, port count, and form factor matched within a 10% tolerance
- Price spread — alternatives shown across the price range, so you can pick on budget
- Brand mix — both OEM-equivalent and trusted aftermarket, all certified
- Reliability data — preferred parts have failure rates below 1% in our 18-month return tracking
- In stock today — shipping today, not 4-6 weeks from now
Want a side-by-side spec comparison?
We can prepare a written comparison covering throughput, power draw, form factor and validated compatibility. Email sales@prodisknetwork.com or call +1 (407) 205-8454 — most quotes ship within 4 business hours.