Commit 7c51c17e authored by Bartlomiej Zolnierkiewicz's avatar Bartlomiej Zolnierkiewicz
Browse files


Use multi PIO by default when available and remove no longer
needed CONFIG_IDEDISK_MULTI_MODE (it should be safe nowadays,
despite to what help entry has been saying).
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <>
parent 7e59ea21
......@@ -131,29 +131,6 @@ config BLK_DEV_IDEDISK
If unsure, say Y.
bool "Use multiple sector mode for Programmed Input/Output by default"
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 }
If in doubt, say N.
tristate "PCMCIA IDE support"
depends on PCMCIA
......@@ -89,16 +89,14 @@ static void ide_disk_init_mult_count(ide_drive_t *drive)
u8 max_multsect = id[ATA_ID_MAX_MULTSECT] & 0xff;
if (max_multsect) {
if ((max_multsect / 2) > 1)
id[ATA_ID_MULTSECT] = max_multsect | 0x100;
id[ATA_ID_MULTSECT] &= ~0x1ff;
drive->mult_req = id[ATA_ID_MULTSECT] & 0xff;
if ((id[ATA_ID_MULTSECT] & 0x100) &&
(id[ATA_ID_MULTSECT] & 0xff))
if (drive->mult_req)
drive->special.b.set_multmode = 1;
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