On 5/20/2011 3:01 PM, Andy Smith wrote: > It's a shame; maybe there will be disks with battery-backed cache > one day. You'll never see a cache DRAM BBU built into a drive. If this *concept* were to be implemented it would be done with flash and a capacitor instead of a BBU. The capacitor would be sized to hold just enough juice to power the ASIC, flash chip, and related circuitry, and write the cache DRAM contents to the flash chip after sensing power to the card has been lost. Many higher end RAID cards already have flash backup of the cache DRAM in addition to, in instead of, a BBU. -- Stan -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
