On Tue, Feb 18, 2003 at 10:23:01AM +0100, [EMAIL PROTECTED] wrote: > On Mon, Feb 17, 2003 at 05:51:16PM -0500, Joshua Baker-LePain wrote: > > On Mon, 17 Feb 2003 at 11:27pm, [EMAIL PROTECTED] wrote > > > > > I am using an Exabyte Eliant 820 tape drive on Linux kernel 2.4.18 and > > > would like to make sure the hardware compression is disabled. Does anyone > > > know how I can check that ? > > > > For that drive, compression is controlled via density. 0x15 is > > uncompressed. > > > > Isn't there a generic way of configuring it, like /dev/nst0 is the
Simple answer is NO, there is no generic way. Case in point, my drive has internal dip switches that if I set them in various configs will totally disable HW compression or will force HW compression on with no ability to change it except reset the switches and power cycle. I have elected to set those switches to power up in no compression, software selectable. But another site might choose differently. > non-rewinding device, isn't there a non compressing device? (I have the > same question actually about being sure a Dell tape is in non > compressing config, but I don't have the complete model details at hand....) Some OS's do use different devices to select compression. I do not think those that use nst# and st# device names use that scheme. Instead they have software to set device properties, generally the mt command. Again, no generic solution there. -- Jon H. LaBadie [EMAIL PROTECTED] JG Computing 4455 Province Line Road (609) 252-0159 Princeton, NJ 08540-4322 (609) 683-7220 (fax)
