Henrique de Moraes Holschuh wrote: > On Tue, 23 Jan 2007, Tejun Heo wrote: >> Henrique de Moraes Holschuh wrote: >>> Does SATA electrical conector keying let the disk firmware unload >>> heads before the user manages to pull it out enough to sever power? >> I don't think so. > > Heh, thought as much. (Good) SCSI hotswap bays notice you pulled the disk > release lever and issue an START_STOP_UNIT by themselves to the disk well > before you have time to start pulling the disk out. I wonder if the SATA > ones do (I kind of doubt that, SATA seems to attract the el-cheapo, el-crapo > crowd of manufacturers).
ahci controller spec has places for such thing but I've never seen it actually implemented. I'm thinking about a CLI tool to list & control libata devices including hotplugging, NCQ and other stuff. Eventually, it would be really nice to give the user/admin easy gui/web/whatever tool to watch and control ATA devices. >>> If it does not, the drive will do an emergency head unload, which is >>> not good and will likely reduce the drive's lifetime. >> Probably. > > So, that means it should be explained in the docs that you are to stop the > disk first, if you can. Yeap, agreed. > Even if hald does this automatically, it would still be a very good idea to > document the proper sequence, IMO... Agreed. -- tejun - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
