Several devices have fixes or workarounds in vendor kernels for data corruptions in the eMMC. This can lead to non-working devices as it could potentially corrupt the bootloaders for instance.
The bug #2104 has more details for the Galaxy SIII.
Affected devices | Vendor kernel patch | Upstream status | Replicant >=9 status | Affected eMMC |
Some Galaxy SIII (GT-I9300) | mmc: Soft-patch MoviNAND VTU00M (16GB) eMMC failure | Not upstream | Not yet ported |