Alternative to 31R3178: Better-Value Equivalents in Stock
Comparing the 31R3178 (31R3178 - IBM 2 Bays Ultra-320 SCSI Storage Expansion Unit for eServer BladeCenter) against alternatives? Pro Disk Network stocks 12 similar IBM 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 31R3178
| SKU | 31R3178 |
|---|---|
| Product | 31R3178 - IBM 2 Bays Ultra-320 SCSI Storage Expansion Unit for eServer BladeCenter |
| Current price | $120.34 |
| Stock status | In Stock |
| Detail page | View 31R3178 › |
Alternatives to 31R3178
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.
26K4847 - IBM 2 Bays Ultra-320 SCSI Storage Expansion Unit for eServer BladeCenter
SKU: 26K4847
Price: $92.28
26K4851 - IBM 2 Bays Ultra-320 SCSI Storage Expansion Unit for eServer BladeCenter
SKU: 26K4851
Price: $129.63
18128VH - IBM System Storage DS4000 EXP420 Storage Expansion Unit Storage enclosure 16 bays ( SATA ) 0 x HD rack-mountable 3U
SKU: 18128VH
Price: $573.97
181281A - IBM 16 Bay Storage Expansion Unit for System Storage DS4000 / EXP810
SKU: 181281A
Price: $392.99
00D7247 - IBM Storage Expansion Node 12 H/S Drive Bays for Flex System X220 / X240
SKU: 00D7247
Price: $514.53
47C2098 - IBM Storage Expansion Node 12 H/S Drive Bays for Flex System X220 / X241
SKU: 47C2098
Price: $1,331.87
00Y3209 - IBM Storage Expansion Node 12 H/S Drive Bays Flex System x220 / x240
SKU: 00Y3209
Price: $1,331.87
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.