输入 csrutil disable 然后回车 ，然后再输入Y 然后回车 在此输入密码执行 SIP就关闭 可以直接重启附议...
4 reads (to get previous contents of block via triple indirect) + 1 write (to write modified block back) 13 14 Worst Case Access Patterns with Unallocated Indirect Blocks ? Worst to write 1 byte – 4 writes (3 indirect blocks; 1 data) – 1 read, 4 writes (read-write 1 indirect, ...
Prior to the introduction of metadata checksums, the extent header + extent entries always left at least 4 bytes of unallocated space at the end of each extent tree data block (because (2^x % 12) >= 4). Therefore, the 32-bit checksum is inserted into this space. The 4 extents in th...
regions: Total=1.1G written=0K(0%) resident=0K(0%) swapped_out=0K(0%) unallocated=1.1G...