[Galaxy S 4 i9505 Original Android Development] 911-Future_Maker:
[MENTION=4277844]chenxiaolong[/MENTION] I tried the v71 build running a fresh new rom installed on extsd-slot-sd5, but still corruption issue. The zip was patched with v71 and updating the ramdisk doesn't help. Can't find anything useful in the logs. :( The ext4 mmcblk1p2 is mounted, but the fat32 mmcblk1p1 is marked as corrupted. Logs below. Ignore the kernel.log as it only contains an old info lines.

Chen it looks like the extsd is properly mounted at raw/extsd, I can see all my files there. Added dmesg and ls_Z logs. The output of the mount command:

root@6752:/ # mount
rootfs on / type rootfs (rw,seclabel)
tmpfs on /dev type tmpfs (rw,seclabel,nosuid,relatime,mode=755)
tmpfs on /dev type tmpfs (rw,seclabel,nosuid,relatime,mode=755)
devpts on /dev/pts type devpts (rw,seclabel,relatime,mode=600)
none on /dev/cpuctl type cgroup (rw,relatime,cpu)
adb on /dev/usb-ffs/adb type functionfs (rw,relatime)
/dev/block/mmcblk0p17 on /raw/system type ext4 (rw,seclabel,noatime,data=ordered)
/dev/block/mmcblk0p18 on /raw/cache type ext4 (rw,seclabel,nosuid,nodev,noatime,discard,noauto_da_alloc,data=ordered)
/dev/block/mmcblk1p1 on /raw/extsd type exfat (rw,dirsync,nosuid,nodev,noexec,relatime,uid=1023,gid=1023,fmask=0007,dmask=0007,allow_utime=0020,codepage=cp437,iocharset=utf8,namecase=0,errors=remount-ro)
/dev/block/mmcblk0p19 on /raw/data type ext4 (rw,seclabel,nosuid,nodev,noatime,discard,noauto_da_alloc,resuid=10010,data=ordered)
/dev/block/loop1 on /system type ext4 (ro,seclabel,relatime,data=ordered)
/dev/block/loop8 on /system/bin/fsck_msdos type ext4 (ro,seclabel,relatime,data=ordered)
/dev/block/loop8 on /system/bin/fsck_msdos_mtk type ext4 (ro,seclabel,relatime,data=ordered)
/dev/block/loop8 on /system/bin/fsck.exfat type ext4 (ro,seclabel,relatime,data=ordered)
/dev/block/loop8 on /system/bin/mount.exfat type ext4 (ro,seclabel,relatime,data=ordered)
/dev/block/mmcblk0p18 on /cache type ext4 (rw,seclabel,nosuid,nodev,noatime,discard,noauto_da_alloc,data=ordered)
/dev/block/mmcblk0p19 on /data type ext4 (rw,seclabel,nosuid,nodev,noatime,discard,noauto_da_alloc,resuid=10010,data=ordered)
/dev/block/mmcblk0p19 on /data/media type ext4 (rw,seclabel,nosuid,nodev,noatime,discard,noauto_da_alloc,resuid=10010,data=ordered)
/dev/block/loop2 on /raw/images/extsd-slot-sd1 type ext4 (rw,seclabel,relatime)
/dev/block/loop3 on /raw/images/extsd-slot-sd2 type ext4 (rw,seclabel,relatime,data=ordered)
/dev/block/loop4 on /raw/images/extsd-slot-sd3 type ext4 (rw,seclabel,relatime,data=ordered)
/dev/block/loop5 on /raw/images/extsd-slot-sd4 type ext4 (rw,seclabel,relatime,data=ordered)
/dev/block/loop6 on /raw/images/extsd-slot-sd5 type ext4 (rw,seclabel,relatime,data=ordered)
/dev/block/loop7 on /raw/images/extsd-slot-sd7 type ext4 (rw,seclabel,relatime,data=ordered)
/dev/block/loop8 on /wrapped type ext4 (ro,seclabel,relatime,data=ordered)
proc on /proc type proc (rw,relatime)
sysfs on /sys type sysfs (rw,seclabel,relatime)
selinuxfs on /sys/fs/selinux type selinuxfs (rw,relatime)
debugfs on /sys/kernel/debug type debugfs (rw,seclabel,relatime)
none on /sys/fs/cgroup type tmpfs (rw,seclabel,relatime,mode=750,gid=1000)
none on /acct type cgroup (rw,relatime,cpuacct)
tmpfs on /mnt type tmpfs (rw,seclabel,relatime,mode=755,gid=1000)
/dev/block/mmcblk0p3 on /protect_f type ext4 (rw,seclabel,nosuid,nodev,noatime,nodelalloc,noauto_da_alloc,commit=1,data=ordered)
/dev/block/mmcblk0p4 on /protect_s type ext4 (rw,seclabel,nosuid,nodev,noatime,nodelalloc,noauto_da_alloc,commit=1,data=ordered)
tmpfs on /storage type tmpfs (rw,seclabel,relatime,mode=755,gid=1000)
/dev/fuse on /mnt/runtime/default/emulated type fuse (rw,nosuid,nodev,noexec,noatime,user_id=1023,group_id=1023,default_permissions,allow_other)
/dev/fuse on /storage/emulated type fuse (rw,nosuid,nodev,noexec,noatime,user_id=1023,group_id=1023,default_permissions,allow_other)
/dev/fuse on /mnt/runtime/read/emulated type fuse (rw,nosuid,nodev,noexec,noatime,user_id=1023,group_id=1023,default_permissions,allow_other)
/dev/fuse on /mnt/runtime/write/emulated type fuse (rw,nosuid,nodev,noexec,noatime,user_id=1023,group_id=1023,default_permissions,allow_other)
/dev/block/vold/public:179_130 on /mnt/media_rw/ad9f2e19-bb5a-6c21-5652-09c3ebf1076a type ext4 (rw,dirsync,context=u:object_r:sdcard_posix:s0,nosuid,nodev,noatime,data=ordered)
/dev/fuse on /mnt/runtime/default/ad9f2e19-bb5a-6c21-5652-09c3ebf1076a type fuse (rw,nosuid,nodev,noexec,noatime,user_id=1023,group_id=1023,default_permissions,allow_other)
/dev/fuse on /storage/ad9f2e19-bb5a-6c21-5652-09c3ebf1076a type fuse (rw,nosuid,nodev,noexec,noatime,user_id=1023,group_id=1023,default_permissions,allow_other)
/dev/fuse on /mnt/runtime/read/ad9f2e19-bb5a-6c21-5652-09c3ebf1076a type fuse (rw,nosuid,nodev,noexec,noatime,user_id=1023,group_id=1023,default_permissions,allow_other)
/dev/fuse on /mnt/runtime/write/ad9f2e19-bb5a-6c21-5652-09c3ebf1076a type fuse (rw,nosuid,nodev,noexec,noatime,user_id=1023,group_id=1023,default_permissions,allow_other)

This line could be the problem:

/dev/block/mmcblk1p1 on /raw/extsd type exfat

It mounts the partition as exfat, but it's formatted in fat32.

Check if you have the boot.img in the /sdcard/Multiboot/data-slot-Data slot. I faced this problem a couple of times before, when installing the rom the boot.img is not copied to the corresponding path then I manually placed the boot image there (from the patched zip this is important!) and the ROM switch and all is working fine. If it's still not working update the ramdisk.