The system is a Toshiba Tecra 730XCDT with a 10X cdrom drive. I get
read errors and a stream of syslog messages like the following whenever
I'm running 2.5.7 and attempt to read a file on a mounted cdrom:
hdc: cdrom_read_intr: data underrun (4294967284 blocks)
end_request: I/O error, dev 16:00, sector 173572
hdc: cdrom_read_intr: data underrun (4294967288 blocks)
end_request: I/O error, dev 16:00, sector 173576
hdc: cdrom_read_intr: data underrun (4294967292 blocks)
end_request: I/O error, dev 16:00, sector 173580
I'm mounting the CD with default options, e.g.,
mount -t iso9660 /dev/cdrom /mnt -r
The particular CD I was accessing at the time is a Slackware 8.0 ISO
image, but I get the errors with other CDs. The 2.4.18 kernel doesn't
have this problem.
More detailed hardware info is available if it would be helpful.
Here are the IDE kernel options I'm using...
/*
* ATA/IDE/MFM/RLL support
*/
#define CONFIG_IDE 1
/*
* ATA and ATAPI Block devices
*/
#define CONFIG_BLK_DEV_IDE 1
/*
* Please see Documentation/ide.txt for help/info on IDE drives
*/
#undef CONFIG_BLK_DEV_HD_IDE
#undef CONFIG_BLK_DEV_HD
#define CONFIG_BLK_DEV_IDEDISK 1
#undef CONFIG_IDEDISK_MULTI_MODE
#undef CONFIG_IDEDISK_STROKE
#undef CONFIG_BLK_DEV_IDEDISK_VENDOR
#undef CONFIG_BLK_DEV_IDEDISK_FUJITSU
#undef CONFIG_BLK_DEV_IDEDISK_IBM
#undef CONFIG_BLK_DEV_IDEDISK_MAXTOR
#undef CONFIG_BLK_DEV_IDEDISK_QUANTUM
#undef CONFIG_BLK_DEV_IDEDISK_SEAGATE
#undef CONFIG_BLK_DEV_IDEDISK_WD
#undef CONFIG_BLK_DEV_COMMERIAL
#undef CONFIG_BLK_DEV_TIVO
#undef CONFIG_BLK_DEV_IDECS
#define CONFIG_BLK_DEV_IDECD 1
#undef CONFIG_BLK_DEV_IDETAPE
#undef CONFIG_BLK_DEV_IDEFLOPPY
#undef CONFIG_BLK_DEV_IDESCSI
#define CONFIG_BLK_DEV_IDESCSI_MODULE 1
/*
* IDE chipset support
*/
#define CONFIG_BLK_DEV_CMD640 1
#undef CONFIG_BLK_DEV_CMD640_ENHANCED
#undef CONFIG_BLK_DEV_ISAPNP
#define CONFIG_BLK_DEV_RZ1000 1
#define CONFIG_BLK_DEV_IDEPCI 1
#undef CONFIG_BLK_DEV_OFFBOARD
#undef CONFIG_IDEPCI_SHARE_IRQ
#define CONFIG_BLK_DEV_IDEDMA_PCI 1
#define CONFIG_IDEDMA_PCI_AUTO 1
#undef CONFIG_IDEDMA_ONLYDISK
#define CONFIG_BLK_DEV_IDEDMA 1
#undef CONFIG_IDEDMA_PCI_WIP
#undef CONFIG_IDEDMA_NEW_DRIVE_LISTINGS
#undef CONFIG_BLK_DEV_AEC62XX
#undef CONFIG_AEC62XX_TUNING
#undef CONFIG_BLK_DEV_ALI15X3
#undef CONFIG_WDC_ALI15X3
#undef CONFIG_BLK_DEV_AMD74XX
#undef CONFIG_BLK_DEV_CMD64X
#undef CONFIG_BLK_DEV_CY82C693
#undef CONFIG_BLK_DEV_CS5530
#undef CONFIG_BLK_DEV_HPT34X
#undef CONFIG_HPT34X_AUTODMA
#undef CONFIG_BLK_DEV_HPT366
#undef CONFIG_BLK_DEV_PIIX
#undef CONFIG_BLK_DEV_NS87415
#undef CONFIG_BLK_DEV_OPTI621
#undef CONFIG_BLK_DEV_PDC_ADMA
#undef CONFIG_BLK_DEV_PDC202XX
#undef CONFIG_PDC202XX_BURST
#undef CONFIG_PDC202XX_FORCE
#undef CONFIG_BLK_DEV_SVWKS
#undef CONFIG_BLK_DEV_SIS5513
#undef CONFIG_BLK_DEV_TRM290
#undef CONFIG_BLK_DEV_VIA82CXXX
#undef CONFIG_IDE_CHIPSETS
#undef CONFIG_IDEDMA_IVB
#define CONFIG_IDEDMA_AUTO 1
#undef CONFIG_DMA_NONPCI
#undef CONFIG_BLK_DEV_ATARAID
#undef CONFIG_BLK_DEV_ATARAID_PDC
#undef CONFIG_BLK_DEV_ATARAID_HPT
-- ----------------------------------------------------------------------- Bob Tracy WTO + WIPO = DMCA? http://www.anti-dmca.org rct@frus.com ----------------------------------------------------------------------- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/