375879-B21 36GB 10K Hot-Plug RPM. 2.5" Single-Port SAS hard drive375870-B21 72GB 3G SAS 15K 3.5" HDD Hot Plug375861-B21 72GB 10K Hot-Plug RPM. 2.5" Single-Port SAS hard drive384852-B21 72GB hot-plug SAS hard drive 15K 3.5" HDD 384842-B21 72GB 10K Hot-Plug RPM. 2.5" Dual-Port SAS hard drive 384854-B21 146GB 15K rpm. 3.5" Dual-Port SAS hard drive 375872-B21 146GB 3G SAS 15K 3.5" HDD Hot Plug431958-B21 146GB 10K Hot-Plug RPM. 2.5" Single-Port SAS hard drive418367-B21 146GB 10K Hot-Plug RPM. 2.5" Dual-Port SAS hard drive507125-B21 146GB 6G 10K Hot-Plug RPM. 2.5" Dual-Port SAS hard drive492620-B21 300GB 10K Hot-Plug RPM. 2.5" Dual-Port SAS hard drive 416127-B21 300GB 3.5" SAS 15K hard drive516814-B21 300GB 6G SAS 3.5''15K hard drive507127-B21 300GB 6G 10K Hot-Plug RPM. 2.5" Dual-Port SAS hard drive431933-B21 36GB 15K Hot-Plug RPM. 2.5" Single-Port SAS hard drive418369-B21 36GB 15K Hot-Plug RPM. 2.5" Dual-Port SAS hard drive