[PATCH] ide: add IDEDISK_MULTI_MODE text adapted from hdparm manual page

[PATCH] ide: add IDEDISK_MULTI_MODE text adapted from hdparm manual page

[Matti Linnanvuori]

From: Matti Linnanvuori <mattilinnanvuori@yahoo.com>

Add IDEDISK_MULTI_MODE text adapted from hdparm manual page.

Signed-off-by: Matti Linnanvuori <mattilinnanvuori@yahoo.com>
---

--- a/drivers/ide/Kconfig	2007-10-26 19:21:15.017817500 +0300
+++ b/drivers/ide/Kconfig	2007-10-26 19:42:56.759696000 +0300
@@ -152,9 +152,22 @@ config BLK_DEV_IDEDISK
 	  If unsure, say Y.
 
 config IDEDISK_MULTI_MODE
-	bool "Use multi-mode by default"
+	bool "Use multiple sector mode for Programmed Input/Output by default"
 	help
-	  If you get this error, try to say Y here:
+	  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 }




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Re: [PATCH] ide: add IDEDISK_MULTI_MODE text adapted from hdparm manual page

[Bartlomiej Zolnierkiewicz]

On Friday 26 October 2007, Matti Linnanvuori wrote:
> From: Matti Linnanvuori <mattilinnanvuori@yahoo.com>
> 
> Add IDEDISK_MULTI_MODE text adapted from hdparm manual page.
> 
> Signed-off-by: Matti Linnanvuori <mattilinnanvuori@yahoo.com>

applied (by hand since the mail was encoded in some strange way)

Thanks,
Bart