resource r2 {
  device /dev/drbd2;
  disk   /dev/ram0;
  meta-disk internal;
  on wcluster1 {
    address 192.168.0.1:7791;
  }
  on wcluster2 {
    address 192.168.0.2:7791;
  }
}

strace -o drbdmeta.trace drbdmeta 2 v08 /dev/ram0 internal create-md:

execve("/sbin/drbdmeta", ["drbdmeta", "2", "v08", "/dev/ram0", "internal", "create-md"], [/* 17 vars */]) = 0
brk(0)                                  = 0x9117000
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
mmap2(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7835000
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
open("/etc/ld.so.cache", O_RDONLY)      = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=16309, ...}) = 0
mmap2(NULL, 16309, PROT_READ, MAP_PRIVATE, 3, 0) = 0xb7831000
close(3)                                = 0
access("/etc/ld.so.nohwcap", F_OK)      = -1 ENOENT (No such file or directory)
open("/lib/tls/i686/cmov/libc.so.6", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0000m\1\0004\0\0\0"..., 512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=1405508, ...}) = 0
mmap2(NULL, 1415592, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x1e2000
mprotect(0x335000, 4096, PROT_NONE)     = 0
mmap2(0x336000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x153) = 0x336000
mmap2(0x339000, 10664, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x339000
close(3)                                = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7830000
set_thread_area({entry_number:-1 -> 6, base_addr:0xb78308d0, limit:1048575, seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, seg_not_present:0, useable:1}) = 0
mprotect(0x336000, 8192, PROT_READ)     = 0
mprotect(0x8059000, 4096, PROT_READ)    = 0
mprotect(0xdc5000, 4096, PROT_READ)     = 0
munmap(0xb7831000, 16309)               = 0
brk(0)                                  = 0x9117000
brk(0x9138000)                          = 0x9138000
mmap2(NULL, 139264, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb780e000
open("/var/lock/drbd-147-2", O_RDWR|O_CREAT, 0600) = 3
rt_sigaction(SIGALRM, {0x80520e0, [], 0}, {SIG_DFL, [], 0}, 8) = 0
alarm(1)                                = 0
fcntl64(3, F_SETLKW, {type=F_WRLCK, whence=SEEK_SET, start=0, len=0}) = 0
alarm(0)                                = 1
rt_sigaction(SIGALRM, {SIG_DFL, [], 0}, NULL, 8) = 0
open("/proc/drbd", O_RDONLY|O_LARGEFILE) = 4
fstat64(4, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7834000
read(4, "version: 8.3.8 (api:88/proto:86-"..., 1024) = 517
read(4, "", 1024)                       = 0
close(4)                                = 0
munmap(0xb7834000, 4096)                = 0
open("/dev/ram0", O_RDWR|O_SYNC|O_DIRECT|O_LARGEFILE) = 4
fstat64(4, {st_mode=S_IFBLK|0660, st_rdev=makedev(1, 0), ...}) = 0
ioctl(4, BLKSSZGET, 0xbf827b1c)         = 0
ioctl(4, BLKGETSIZE64, 0xbf827a50)      = 0
pread64(4, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096, 536866816) = 4096
open("/var/lib/drbd/drbd-minor-2.lkbd", O_RDONLY) = -1 ENOENT (No such file or directory)
pread64(4, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 69632, 0) = 69632
pread64(4, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096, 402653184) = 4096
pread64(4, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 4096, 536866816) = 4096
fstat64(1, {st_mode=S_IFCHR|0620, st_rdev=makedev(136, 2), ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7834000
write(1, "Writing meta data...\n", 21)  = 21
write(1, "initializing activity log\n", 26) = 26
pwrite64(4, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 32768, 536834048) = -1 EIO (Input/output error)
write(2, "pwrite(4,...,32768,536834048) in"..., 84) = 84
exit_group(10)                          = ?