On Thursday, August 15, 2013 08:13:02 AM Per Jessen wrote:
Wouldn't/couldn't openSUSE be controlling that?
I don't think so, no - I don't know of anywhere in openSUSE where you're able to specify it.
Via hdparam perhaps? Another person in this thread reported that their disk also has write cache enabled. And that was on a laptop where power loss is more common than a system on a UPS. So maybe more poeple have this than expect. I just checked a few more 12.3 systems, and I see things like: sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sd 1:0:0:0: [sdb] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sd 2:0:0:0: [sdc] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sd 3:0:0:0: [sdd] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sd 4:0:0:0: [sde] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sd 8:0:0:0: [sdf] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sd 9:0:0:0: [sdg] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sd 12:0:0:0: [sdh] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA In fact, I do not see any systems locally where disk write cache is not enabled. There is a mix of Seagate and Western Digital SATA disks. My oldest 10.0 system (soon to be replaced...) has write cache enabled for an old Seagate ATA disk. hdparm -I /dev/hda Commands/features: Enabled Supported: * READ BUFFER cmd * WRITE BUFFER cmd * Host Protected Area feature set * Look-ahead * Write cache * Power Management feature set Security Mode feature set * SMART feature set * FLUSH CACHE EXT command * Mandatory FLUSH CACHE command * Device Configuration Overlay feature set * 48-bit Address feature set SET MAX security extension * DOWNLOAD MICROCODE cmd * SMART self-test * SMART error logging Perhaps I am looking at this in the wrong way? -- Yours sincerely, Roger Oberholtzer Ramböll RST / Systems Office: Int +46 10-615 60 20 Mobile: Int +46 70-815 1696 roger.oberholtzer@ramboll.se ________________________________________ Ramböll Sverige AB Krukmakargatan 21 P.O. Box 17009 SE-104 62 Stockholm, Sweden www.rambollrst.se -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org