https://bugzilla.kernel.org/show_bug.cgi?id=215788 --- Comment #3 from Jernej Simončič (jernej-bugzilla.kernel@xxxxxx) --- Done, it points at this commit: e815d36548f01797ce381be8f0b74f4ba9befd15 is the first bad commit commit e815d36548f01797ce381be8f0b74f4ba9befd15 Author: Damien Le Moal <damien.lemoal@xxxxxxx> Date: Wed Oct 27 11:22:20 2021 +0900 scsi: sd: add concurrent positioning ranges support Add the sd_read_cpr() function to the sd scsi disk driver to discover if a device has multiple concurrent positioning ranges (i.e. multiple actuators on an HDD). The existence of VPD page B9h indicates if a device has multiple concurrent positioning ranges. The page content describes each range supported by the device. sd_read_cpr() is called from sd_revalidate_disk() and uses the block layer functions disk_alloc_independent_access_ranges() and disk_set_independent_access_ranges() to represent the set of actuators of the device as independent access ranges. The format of the Concurrent Positioning Ranges VPD page B9h is defined in section 6.6.6 of SBC-5. Signed-off-by: Damien Le Moal <damien.lemoal@xxxxxxx> Reviewed-by: Hannes Reinecke <hare@xxxxxxx> Reviewed-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx> Reviewed-by: Keith Busch <kbusch@xxxxxxxxxx> Link: https://lore.kernel.org/r/20211027022223.183838-3-damien.lemoal@xxxxxxx Signed-off-by: Jens Axboe <axboe@xxxxxxxxx> drivers/scsi/sd.c | 81 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ drivers/scsi/sd.h | 1 + 2 files changed, 82 insertions(+) -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
