** Description changed: Binary package hint: linux-source-2.6.24 As far as I'm aware, there's no support for the non-volatile RAM cache on hybrid hard drives (SATA disk plus non-volatile RAM) under Ubuntu / Linux. Using the non-volatile RAM could reduce power consumption by increasing time between spin-ups, and reducing the risk of data loss if the heads are parked suddenly during vibration. If boot-up files are - put on the flash then booting can be faster and consume less power too - (though Ubuntu already boots pretty fast.) The drive in my laptop is a - 160GB Seagate ST91608220AS with 256 MB flash. Until NV cache is - supported, hybrid hard drives work as ordinary SATA disks. + put on the flash then booting can be faster and consume less power too. + The drive in my laptop is a 160GB Seagate ST91608220AS with 256 MB + flash. Until NV cache is supported, hybrid hard drives work as ordinary + SATA disks. + + papers describing NV cache implementations are here: + http://www.ssrc.ucsc.edu/Papers/ssrctr-07-04.pdf + http://www.soe.ucsc.edu/~darrell/Papers/MASCOTS-Bisson-06.pdf + + And the specification is in ATA8-ACS: + 33 e05106r7 New Feature: Adds commands to manipulate NV cache in hybrid devices + + http://www.t13.org/Documents/UploadedDocuments/docs2007/D1699r4a- + ATA8-ACS.pdf
-- No support for hybrid hard drive https://bugs.launchpad.net/bugs/178654 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
