tree 920c2447b1c9fb80a635f4ad4c71caca771b21e0
parent 307337fb40539fc2ab6bb3384ec3b679e36b78b2
author Mark Salyzyn <salyzyn@google.com> 1543364075 -0800
committer Mark Salyzyn <salyzyn@google.com> 1543868125 -0800

fs_mgr: Change scratch margin to 3 X logical_block_size.

Found a device with a 3/4MB erase block, give a wider margin so that
flashing a single partition is unlikely to be blocked by scratch.

Add documentation to tell developers to flashall to clear scratch.

Test: adb-remount-test.sh
Bug: 109821005
Change-Id: Ic219283f4c42e457b98991bcd1752253e182eff3