HP Proliant – Replace the HP Smart Array RAID controller with a new generation controller (for example, 410 -> 420).

I have a faulty P410 Smart Array Controller in my G6 ProLiant, so I decided to replace it. Since I want more flexibility, I do not replace it with another P410, but with the subsequent P420 (much of the SAAP functionality comes with no additional license fees).

Apart from the fact that the P420 is a PCIe 3.0 card, while the P410 and my server only provide PCIe 2.0, can further incompatibilities occur?

I read a statement from HP that this should be technically possible. But can someone confirm this from their own experience?

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Linux – Icy Box Raid Enclosure spin-down does not work

I'm using Ubuntu Server 18.04 and an ICY BOX IB-RD2253-U31 package with two WD Black disks (not NAS disks) in RAID 1 (Mirror) mode.

I want to put the two hard disks into sleep mode / shut down with hdparm (energy-saving mode with the lowest power consumption) sudo hdparm -Y /dev/sdb but the discs seem to be running as if nothing had happened. I tried too sudo udisksctl power-off -b /dev/sdb: This causes the operating system to eject the drives, but the drives are still running (I can hear them and a small click on power off with the built-in power button).

Is this the fault of the case? And is there a way to shut down the hard drives completely until they are needed again?

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Dual Boot – MUST the storage mode in the BIOS be switched from RAID to AHCI to install Ubuntu?

I'm a pure Windows user who decided to jump to Ubuntu based on the nature of my work. And God, is it just trouble? I am trying to install Ubuntu 18.04 on a Windows 10 Home Laptop.

First, I had to look around the internet to find out I had to manually rename the mmx64.efi file, otherwise my USB would not even boot.

Now a new problem of which I have no idea how to handle it: The memory partition that I have created for my m.2 NVME SSD in Windows is never recognized by the Ubuntu loaded on the USB stick.

Online searches have led to very contradictory proposals:

1) Change the storage type in BIOS from RAID (Acer has preconfigured my laptop to RAID) to AHCI

2) BUT hey! AHCI is based on SATA, so it is speculated that:
a) I lose the NVME speed
b) Windows only starts based on the previously known memory configuration, which is RAID, so that AHCI essentially blocks Windows (which negates the purpose of dual-boot LOL).

I'm essentially at the end with my Latin, please help πŸ™

The only link I found is this: The Ubuntu installer does not recognize NVMe SSD – Lenovo Yoga 720 15-IKB

mdadm – Why is RAID 0 slower than a single NVME drive?

I have created an MD RAID 0 array with two NVME drives. I find that using two different drives instead of identical drives is not optimal, but if I've just bought a new one, they're all faster than my one-year drive.
Using Patriot Scorch 512 GB Nvme and Mushkin Helix 256 GB. I've each created a 32 GB partition and created the MD RAID 0 array with 16 KB blocks and formatted it for testing in EXT4.

kde-swiebel@T5600-kde:~$ cat /proc/mdstat
Personalities : (raid0) 
unused devices: 
kde-swiebel@T5600-kde:~$ sudo mdadm -Cv -l0 -c16 -n2 /dev/md0   /dev/nvme0n1p3 /dev/nvme1n1p2 
mdadm: /dev/nvme0n1p3 appears to contain an ext2fs file system
       size=34277376K  mtime=Wed Dec 31 17:00:00 1969
mdadm: /dev/nvme1n1p2 appears to contain an ext2fs file system
       size=34277376K  mtime=Wed Dec 31 17:00:00 1969
Continue creating array? y
mdadm: Defaulting to version 1.2 metadata
mdadm: array /dev/md0 started.
kde-swiebel@T5600-kde:~$ cat /proc/mdstat
Personalities : (raid0) 
md0 : active raid0 nvme1n1p2(1) nvme0n1p3(0)
      68487168 blocks super 1.2 16k chunks

unused devices: 
kde-swiebel@T5600-kde:~$ sudo mkfs.ext4 -F /dev/md0
mke2fs 1.44.6 (5-Mar-2019)
Discarding device blocks: done                            
Creating filesystem with 17121792 4k blocks and 4284416 inodes
Filesystem UUID: f9826f0f-7ba4-40b2-9c9f-861379e82703
Superblock backups stored on blocks: 
        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 
        4096000, 7962624, 11239424

Allocating group tables: done                            
Writing inode tables: done                            
Creating journal (131072 blocks): done
Writing superblocks and filesystem accounting information: done   

Benchmarks from Gnome-disk-utility 3.32.1
1000 samples, 1MB size

Patriot scorch
Average read: 1362.2 MB / s
Average writing: 228.7 MB / s
Average access time 0.07 ms

Mushkin Helix
Average reading: 1529.5 MB / s
Average writing: 1003.1 MB / s
Average access time 0.06 ms

/ dev / md0
Average reading: 1751.3 MB / s
Average writing: 26.9 MB / s
Average access time 0.05 ms

Change to 100 samples, 100 MB size, read-only
/ dev / md0
Average read: 2927.6 MB / s
Average writing: NA
Average access time 0.04 ms

The read speed is faster than either drive alone, but when I switched the test to read-only, it improved a lot.
The writing speed was terrible though. The write speed was 10% of the slowest drive.

I tried removing the RAID array and creating it with different block sizes (4K, 32K, 128K), but little was changed with each change. The write speed was between 11 MB / s and 32 MB / s

According to Phoronix and other websites, I'm doing that right and should see a lot more profit.

Using mdadm version 4.1-1ubuntu1, kernel 5.0.0-25-generic
Running on a Dell T5600 with Dual Xeon E5-2609 (Quad Core 2.4GHz)

Any ideas, what did I do wrong?

Problems accessing gpt raid partitions on Linux Ubuntu 16.04.2 LTS

I had a 6 year old server that I exchanged and upgraded last summer. It was an AMD Athlon system with 2 CPUs (18 cores each) whose sole purpose was to use VMs (using KVM) for my doctoral students to test their research. It contained a 1 TB boot disk and 4 TB disks in a Raid6 array. I periodically shut down the VMs and backed up the virtual disks. The server was in a secure server room with limited access. Earlier this week, the unthinkable happened and there was a fire in the server room. I was able to remotely access the system and shut it down properly (shutdown -h now).

The machine itself is not too damaged, but full of toxic soot. The technicians were able to remove and clean the drives from the machine. I currently have them on a rented desktop 7-core Intel computer, and while there are not enough drive bays, there are enough sata ports. The idea was to boot from the transplanted boot disk and mdadm would rebuild the drives based on UUIDs. We could then back up the virtual disks in a priority order. When booting, however, the RAID array was not present.
Resetting to the previous machine is not really an option, as there is still a considerable amount of very fine toxic soot in the case where the fans are spreading everywhere.

I'm in the process of transferring the raw data from the 4 Raid hard drives with dd to a large external drive so we can keep the data even if it fails due to damage. So far, the disks behave themselves. Two volumes were copied without errors reported by dd, and the third is in progress. The system logs apparently also contain no hard disk errors.

Currently, the problem seems to be that the system does not see the partitions on the 2TB drives. The command & # 39; parted / dev / sdb print & # 39; does not report anything on the drive. I used fdisk and got the following results. I have shown the help menus (but only displayed the options I used).

Script started on Sat 31 Aug 2019 11:17:57 AM EDT
root@perseus:~/usb2# fsdisk /dev/sdb
Welcome to fdisk (util-linux 2.27.1).
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/sdb: 1.8 TiB, 2000398934016 bytes, 3907029168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: 2947A17A-DC83-4C60-8D2A-63D2403015DD

Command (m for help): m

Help:
...
  Misc
   m   print this menu
   x   extra functionality (experts only)
...

Command (m for help): x

Expert command (m for help): m

Help (expert commands): m
...
  GPT
   i   change disk GUID
   n   change partition name
   u   change partition UUID
   M   enter protective/hybrid MBR
..

Expert command (m for help): p
Disk /dev/sdb: 1.8 TiB, 2000398934016 bytes, 3907029168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: 2947A17A-DC83-4C60-8D2A-63D2403015DD
First LBA: 34
Last LBA: 3907029134
Alternative LBA: 3907029167
Partition entries LBA: 2
Allocated partition entries: 128

Expert command (m for help): M
Entering protective/hybrid MBR disklabel.

Expert command (m for help): p
Disk /dev/sdb: 1.8 TiB, 2000398934016 bytes, 3907029168 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0x00000000

Device     Boot Start        End    Sectors Id Type Start-C/H/S   End-C/H/S Attrs
/dev/sdb1           1 3907029167 3907029167 ee GPT        0/2/0 1023/63/255      

Partition 1 does not start on physical sector boundary.

Expert command (m for help): q

root@perseus:~/usb2# exit
exit

Script done on Sat 31 Aug 2019 11:18:51 AM EDT

All drives will give identical results. I assume that not all of them would be damaged in the same way if there were problems with shutting down during the fire.

So, the partition seems to exist, but is not found by parted and partprobe. I checked with asmod and loaded the modules raid456, raid6_pq and async_raid6_recov. If the partition is not in / dev, to my knowledge, the variants of mdadm, which are to scan the raid or to assemble specifically, do not work. I tried it anyway, but no luck.

The system was reinstalled and configured last summer using the Ubuntu 16.04 Server Installation DVD (the previous Raids disks were backed up and replaced with new ones). As far as I know, there was nothing special about the installation other than using a bridge network device so the PhD students could remotely access their individual virtual machines. The boot volume and the RAID array were created and configured by the Ubuntu installer with default options, as far as I remember.

I tried to follow the advice through the following link, but I did not use anything that could be destructive, as I'm still backing up the raw data from the drives.

Partition is not displayed in / dev

Any ideas on how to make the partitions visible? The PhD student is currently writing a thesis, and although she has the most data (from previous backups), data on those volumes is required.

Many thanks.

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