From 127ba2896512699338d997418d7cf5064720b55b Mon Sep 17 00:00:00 2001 From: Matti Linnanvuori Date: Mon, 5 Nov 2007 21:42:26 +0100 Subject: ide/Kconfig: add IDEDISK_MULTI_MODE text adapted from hdparm manual page Add IDEDISK_MULTI_MODE text adapted from hdparm manual page. Signed-off-by: Matti Linnanvuori Signed-off-by: Bartlomiej Zolnierkiewicz --- drivers/ide/Kconfig | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-) (limited to 'drivers') diff --git a/drivers/ide/Kconfig b/drivers/ide/Kconfig index 6eaece96524..e2c21699603 100644 --- a/drivers/ide/Kconfig +++ b/drivers/ide/Kconfig @@ -152,9 +152,22 @@ config BLK_DEV_IDEDISK If unsure, say Y. config IDEDISK_MULTI_MODE - bool "Use multi-mode by default" - help - If you get this error, try to say Y here: + bool "Use multiple sector mode for Programmed Input/Output by default" + help + This setting is irrelevant for most IDE disks, with direct memory + access, to which multiple sector mode does not apply. Multiple sector + mode is a feature of most modern IDE hard drives, permitting the + transfer of multiple sectors per Programmed Input/Output interrupt, + rather than the usual one sector per interrupt. When this feature is + enabled, it can reduce operating system overhead for disk Programmed + Input/Output. On some systems, it also can increase the data + throughput of Programmed Input/Output. Some drives, however, seemed + to run slower with multiple sector mode enabled. Some drives claimed + to support multiple sector mode, but lost data at some settings. + Under rare circumstances, such failures could result in massive + filesystem corruption. + + If you get the following error, try to say Y here: hda: set_multmode: status=0x51 { DriveReady SeekComplete Error } hda: set_multmode: error=0x04 { DriveStatusError } -- cgit v1.2.3