HDDs and SSDs in the 2.5" form factor are getting more and more popular as their storage capacity is growing and especially SSDs offer far greater transfer rates than traditional HDDs. It is a logical consequence to employ them in servers. That's why ICY BOX offers a mobile rack that fits into a single 3.5" unit and holds 1x 2.5" SATA/SAS HDDs or SSDs. This ICY BOX works reliably even with huge amounts of data being transferred. That's a great recommendation for the hard duty in RAID systems. Everything is as solid and safe as you know it from the ICY BOX backplanes for the big ones.