FYI: how gpart show -p reports the same microsdhc card in a USB reader vs. in the microsdcard slot (on a Pine64+ 2GB)
Ian Lepore
ian at freebsd.org
Thu Aug 30 13:54:14 UTC 2018
On Thu, 2018-08-30 at 02:39 -0700, Mark Millard via freebsd-arm wrote:
> [I do not currently have access to any alternates to the
> Pine64+ 2GB that have a micro sdcard slot. So I can not
> say that this is specific to the Pine64+ 2GB type of
> context: no evidence for other contexts.]
>
> gpart show -p when the microsdhc card is in a USB-based
> reader:
>
> => 63 62333889 da4 MBR (30G)
> 63 16380 - free - (8.0M)
> 16443 131040 da4s1 fat32lba [active] (64M)
> 147483 997 - free - (499K)
> 148480 62185470 da4s2 freebsd (30G)
> 62333950 2 - free - (1.0K)
>
> => 0 62185470 da4s2 BSD (30G)
> 0 62185470 da4s2a freebsd-ufs (30G)
>
> => 0 62185470 ufsid/5b81680084249dc0 BSD (30G)
> 0 62185470 ufsid/5b81680084249dc0a freebsd-ufs (30G)
>
> => 0 62185470 ufs/PINE642GBrootfs BSD (30G)
> 0 62185470 ufs/PINE642GBrootfsa freebsd-ufs (30G)
>
> vs. when the same microsdhc card is in the mmcsd0 slot:
>
> => 63 62333889 mmcsd0 MBR (30G)
> 63 16380 - free - (8.0M)
> 16443 131040 mmcsd0s1 fat32lba [active] (64M)
> 147483 997 - free - (499K)
> 148480 62185470 mmcsd0s2 freebsd (30G)
> 62333950 2 - free - (1.0K)
>
> Despite what the mmcsd0 case does not show, it seems to
> work fine for the freebsd-ufs file system being the root
> file system for booting from /dev/mmcsd0 .
>
> In fact the /etc/fstab used has:
>
> /dev/ufs/PINE642GBrootfs / ufs
> rw,noatime 1 1
> /dev/label/PINE642GBboot /boot/efi msdosfs
> rw,noatime 0 0
>
> which show up just fine:
>
> # df -m
> Filesystem 1M-blocks Used Avail Capacity Mounted on
> /dev/ufs/PINE642GBrootfs 29400 26971 77 100% /
> devfs 0 0 0 100% /dev
> /dev/label/PINE642GBboot 63 0 63 0% /boot/efi
>
> So the freebsd-ufs content is found and used.
>
It's all but impossible to dig any meaning out of that jumbled wall of
text, but from the subject line I surmise you're saying that an sdcard
in a usb card reader shows a different geometry or size than that same
card in a native sd slot. That's normal and expected and has always
been so.
-- Ian
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