Hello Chris Hi from Adi Here is a update on my findings from 15.04 PPC64LE Live image: I tried latest driver from avago 06.809.16. Preliminary every thing looked okay: Creating, deleting and accessing RAID0 volume. However, coming to particular error that we are facing that: 15.04 Ubuntu Disk Install blocked on Avago RAID Disk. That error,from logs and console messages, has to do with mounting ext4 file system on Avago Raid Disk. But as you can imagine it’s a bit hard to reproduce this full install and debug. So I tried to reproduce that specific part of mounting in live image with newest driver. So basically I focussed to pin point on what’s causing that error: a)I created a partition on raid disk (from Avago) with ext4. b)Tried to mount the ext4 Doing so returns an I/O error, even in live image with Avago’s latest driver . I pasted the commands below: and DMESG error at extreme bottom: Procedure to reproduce this error: To make it more simple to reproduce and debug: I booted to a Live Ubuntu OS PPC64LE 15.04 Version: And executed the following commands: storcli64 /c0 /vall del force (delete virtual disk) storcli64 /c0 add vd type=r0 drives=252:0-3 (Create new v drive) storcli64 /c0 /vall start init force (Initiate the v drive) root@ubuntu:/# fdisk /dev/sda Welcome to fdisk (util-linux 2.25.2). Changes will remain in memory only, until you decide to write them. Be careful before using the write command. Command (m for help): p Disk /dev/sda: 3.5 TiB, 3838627020800 bytes, 7497318400 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: gpt Disk identifier: C6F3B670-24BB-49AE-8AA3-FB05B7E8D6A9 Command (m for help): n Partition number (1-128, default 1): 1 First sector (2048-7497318366, default 2048): Last sector, +sectors or +size{K,M,G,T,P} (2048-7497318366, default 7497318366): Created a new partition 1 of type 'Linux filesystem' and of size 3.5 TiB. Command (m for help): p Disk /dev/sda: 3.5 TiB, 3838627020800 bytes, 7497318400 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: gpt Disk identifier: C6F3B670-24BB-49AE-8AA3-FB05B7E8D6A9 Device Start End Sectors Size Type /dev/sda1 2048 7497318366 7497316319 3.5T Linux filesystem Command (m for help): w The partition table has been altered. Calling ioctl() to re-read partition table. Syncing disks. root@ubuntu:/# fdisk -l Disk /dev/loop0: 342.8 MiB, 359481344 bytes, 702112 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk /dev/sdb: 3.8 GiB, 4037017600 bytes, 7884800 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: gpt Disk identifier: 653C790A-3C1F-4FE3-8E11-2E894CE92681 Device Start End Sectors Size Type /dev/sdb1 34 15659 15626 7.6M Linux filesystem /dev/sdb2 15660 2634800 2619141 1.3G Linux filesystem /dev/sdb3 2634801 3017613 382813 186.9M Linux swap /dev/sdb4 3017614 7884766 4867153 2.3G Linux filesystem Disk /dev/sda: 3.5 TiB, 3838627020800 bytes, 7497318400 sectors Units: sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disklabel type: gpt Disk identifier: C6F3B670-24BB-49AE-8AA3-FB05B7E8D6A9 Device Start End Sectors Size Type /dev/sda1 2048 7497318366 7497316319 3.5T Linux filesystem root@ubuntu:/# mke2fs -t ext4 /dev/sda1 mke2fs 1.42.12 (29-Aug-2014) Creating filesystem with 937164528 4k blocks and 234291200 inodes Filesystem UUID: 969d84bc-9c73-471c-9923-35bba1abd650 Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968, 102400000, 214990848, 512000000, 550731776, 644972544 Allocating group tables: done Writing inode tables: done Creating journal (32768 blocks): done Writing superblocks and filesystem accounting information: done root@ubuntu:/# mount /dev/sda1 /storage root@ubuntu:/# root@ubuntu:/# root@ubuntu:/# [ 4914.483029] sda1: WRITE SAME failed. Manually zeroing. [ 4914.523043] blk_update_request: I/O error, dev sda, sector 10512 DMESG error: [ 4727.136629] sda: [ 4881.211050] sda: sda1 [ 4911.205539] EXT4-fs (sda1): mounted filesystem with ordered data mode. Opts: (null) [ 4914.483029] sda1: WRITE SAME failed. Manually zeroing. [ 4914.483254] megasas: FW status 0x3 [ 4914.490970] megasas: FW status 0x3 [ 4914.498966] megasas: FW status 0x3 [ 4914.506966] megasas: FW status 0x3 [ 4914.514966] megasas: FW status 0x3 [ 4914.522968] megasas: FW status 0x3 [ 4914.523017] sd 0:2:0:0: [sda] FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK [ 4914.523023] sd 0:2:0:0: [sda] CDB: [ 4914.523027] Write(16): 8a 00 00 00 00 00 00 00 29 10 00 00 0f f8 00 00 [ 4914.523043] blk_update_request: I/O error, dev sda, sector 10512 Thanks Adi