Hello,
I have a HiKey960 and am currently booting Debian 4.15 from an SD card. I am interested in mounting the onboard UFS as a block device. At boot I receive the following console output:
Is there a way to mount the UFS as a block device?
Thank You.
@TEST you should be able to see UFS as a block device as follows:
root@linaro-developer:~# fdisk -l /dev/sdd
GPT PMBR size mismatch (7805956 != 7805951) will be corrected by w(rite).
The backup GPT table is corrupt, but the primary appears OK, so that will be used.
Disk /dev/sdd: 29.8 GiB, 31973179392 bytes, 7805952 sectors
Units: sectors of 1 * 4096 = 4096 bytes
Sector size (logical/physical): 4096 bytes / 16384 bytes
I/O size (minimum/optimal): 16384 bytes / 8192 bytes
Disklabel type: gpt
Disk identifier: 2CB85345-6A91-4043-8203-723F0D28FBE8
Device Start End Sectors Size Type
/dev/sdd1 256 511 256 1M Microsoft basic data
/dev/sdd2 512 3583 3072 12M Microsoft basic data
/dev/sdd3 3584 5119 1536 6M Microsoft basic data
/dev/sdd4 5120 8191 3072 12M Linux filesystem
/dev/sdd5 8192 73727 65536 256M Microsoft basic data
/dev/sdd6 73728 73983 256 1M Microsoft basic data
/dev/sdd7 73984 90367 16384 64M EFI System
/dev/sdd8 90368 94463 4096 16M Microsoft basic data
/dev/sdd9 94464 94975 512 2M Microsoft basic data
/dev/sdd10 94976 1295103 1200128 4.6G Linux filesystem
/dev/sdd11 1295104 1495807 200704 784M Microsoft basic data
/dev/sdd12 1495808 1496063 256 1M Microsoft basic data
/dev/sdd13 1496064 7805951 6309888 24.1G Linux filesystem
Note: Here you should use /dev/sdd13 (user-data partition) only as other partitions may have useful data required to boot.
I am unable to see the UFS chip as "/dev/sdd. I currently am booting Debian from an SD card and do not have Debian flashed to the internal UFS chip. Do I have to have to have Linux running on the UFS to recognize it from the operating system running on the SD card? I also noticed that the Debian SD image does not have any SCSI or UFS modules compiled. Is this not a problem?
@TEST I again had a closer look at your logs, it seems your hikey960 is fitted with hynix UFS flash which has a potential timing issue whose fix is available here [1]. I haven’t tried this fix as my hikey960 has different UFS flash.
So I would suggest you to apply this patch to 96boards-hikey kernel [2] and update kernel on hikey960 following this guide [3].
[1] LKML: John Stultz: [PATCH v3] scsi: ufs: Fix hynix ufs bug with quirk on hi36xx SoC
[2] https://github.com/96boards-hikey/linux/tree/hikey960-upstream-rebase
[3] https://github.com/96boards/documentation/blob/master/consumer/hikey/hikey620/build/linux-kernel.md
