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Commit 4e520033 authored by Mark Lord's avatar Mark Lord Committed by Jeff Garzik
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sata_mv: improve warnings about Highpoint RocketRAID 23xx cards 



Improve the existing boot/load time warnings from sata_mv
for Highpoint RocketRAID 23xx cards, based on new knowledge
about where the BIOS likes to overwrite sectors with metadata.

Harmless to us, but very useful for end users.

Signed-off-by: default avatarMark Lord <mlord@pobox.com>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
parent e41bd3e8

drivers/ata/sata_mv.c

+25 −5
Original line number Diff line number Diff line
@@ -2506,11 +2506,31 @@ static int mv_chip_id(struct ata_host *host, unsigned int board_idx) 
		if (pdev->vendor == PCI_VENDOR_ID_TTI &&

		    (pdev->device == 0x2300 || pdev->device == 0x2310))

		{

			printk(KERN_WARNING "sata_mv: Highpoint RocketRAID BIOS"

				" will CORRUPT DATA on attached drives when"

				" configured as \"Legacy\".  BEWARE!\n");

			printk(KERN_WARNING "sata_mv: Use BIOS \"JBOD\" volumes"

				" instead for safety.\n");

			/*

			 * Highpoint RocketRAID PCIe 23xx series cards:

			 *

			 * Unconfigured drives are treated as "Legacy"

			 * by the BIOS, and it overwrites sector 8 with

			 * a "Lgcy" metadata block prior to Linux boot.

			 *

			 * Configured drives (RAID or JBOD) leave sector 8

			 * alone, but instead overwrite a high numbered

			 * sector for the RAID metadata.  This sector can

			 * be determined exactly, by truncating the physical

			 * drive capacity to a nice even GB value.

			 *

			 * RAID metadata is at: (dev->n_sectors & ~0xfffff)

			 *

			 * Warn the user, lest they think we're just buggy.

			 */

			printk(KERN_WARNING DRV_NAME ": Highpoint RocketRAID"

				" BIOS CORRUPTS DATA on all attached drives,"

				" regardless of if/how they are configured."

				" BEWARE!\n");

			printk(KERN_WARNING DRV_NAME ": For data safety, do not"

				" use sectors 8-9 on \"Legacy\" drives,"

				" and avoid the final two gigabytes on"

				" all RocketRAID BIOS initialized drives.\n");

		}

	case chip_6042:

		hpriv->ops = &mv6xxx_ops;