Storage controllers for every major platform, including cache batteries and backup units.
Browse 728 products in RAID Controllers.
We carry the full storage-controller ecosystem: Dell PERC, HPE Smart Array, Broadcom/LSI MegaRAID, and plain HBAs for software-defined storage (ZFS, Ceph, Storage Spaces) where the OS — not the card — manages redundancy. Just as important are the consumables around them: cache batteries (BBU) and flash-backed write cache modules degrade on a schedule and silently disable write-back caching when they fail, dropping array performance sharply.
If your monitoring reports a cache battery fault or write-back disabled, the fix is usually a sub-$100 battery — one of the highest performance-per-dollar repairs in server hardware. Send the controller model and we will pinpoint the right battery or capacitor module.
Hardware RAID (PERC, Smart Array, MegaRAID) when the controller manages the array; a plain HBA in IT mode when software like ZFS, Ceph, or vSAN needs direct drive access. Mixing the two models causes problems.
Controllers disable write-back caching when the cache battery fails to protect in-flight data, falling back to much slower write-through mode. Replacing the battery restores full performance.
Same-family replacements (e.g. PERC to a compatible PERC) typically import the existing array configuration from the drives. We will confirm import compatibility for your exact models before you order.