(In reply to Ruediger Oertel from comment #5) > hm, different error message but still does not work: > > s390p21:~ # echo /dev/zram0 > /sys/fs/bcache/register > -bash: echo: write error: Invalid argument > > [4830275.525506] zram: Added device: zram0 > [4830291.485844] zram0: detected capacity change from 0 to 8589934592 > [4830321.315018] bcache: register_bcache() error opening /dev/dm-2: Bad > checksum > [4830328.502621] bcache: register_bcache() error opening /dev/zram0: Bad > checksum Can I access this machine, compile bcache-tools source and run it on this machine ? So far I still do not have my own s390 machine ready. Thanks. Coly Li