Re: [gentoo-user] How to use SR-IOV on a LSI RAID controller

[R0b0t1]

On Thu, Mar 8, 2018 at 6:07 PM, taii...@gmx.com  wrote:
> Again please I know how to assign devices and my board has excellent IOMMU
> groups that is not the issue - I want to know how to create the SR-IOV
> virtual functions and assign drives to them to use the same controller on
> more than one VM concurrently.

I see, sorry. This I can not find. What I can find is SR-IOV
documentation for network devices, but nothing for storage or graphics
devices.

It looks like the details are still unrecovered.

Re: [gentoo-user] How to use SR-IOV on a LSI RAID controller

[taii...@gmx.com]

On 03/08/2018 06:55 PM, R0b0t1 wrote:


https://wiki.archlinux.org/index.php/PCI_passthrough_via_OVMF
https://wiki.installgentoo.com/index.php/PCI_passthrough
https://www.kernel.org/doc/Documentation/vfio.txt

The one sticking point is that you need to figure out the layout of
your PCIe lanes to share multiple devices without conflicts.

Cheers,
  R0b0t1

No not cheers :< that is not what I am asking for.

Again please I know how to assign devices and my board has excellent 
IOMMU groups that is not the issue - I want to know how to create the 
SR-IOV virtual functions and assign drives to them to use the same 
controller on more than one VM concurrently.

Re: [gentoo-user] How to use SR-IOV on a LSI RAID controller

[R0b0t1]

On Thu, Mar 8, 2018 at 4:14 PM, taii...@gmx.com  wrote:
> On 03/07/2018 09:02 PM, R0b0t1 wrote:
>
>> On Wed, Mar 7, 2018 at 7:52 PM, taii...@gmx.com  wrote:
>>>
>>> I bought a LSI-9211-8i / SAS 2008 controller which reports support for
>>> SR-IOV in lspci and I am wondering how I can use it.
>>>
>>> There is no info on the internet about this not even for their newer
>>> controllers where there is a lot of advertising about SR-IOV.
>>>
>>> The idea is that you can assign a RAID array, individual hard drive, etc
>>> to
>>> a VF which is then assigned to a VM via IOMMU providing better almost
>>> native
>>> performance vs emulated disks.
>>>
>>> Thanks!
>>
>> If it supports SR-IOV you can pass it to a guest with VFIO. If it did
>> not support SR-IOV it would not support VFIO.
>
> I know - my question is how do I create the virtual functions and assign the
> drives to them instead of simply attaching the entire controller?
>
> According to LSI's press release you could have for instance 5 different
> RAID's assigned to 5 different VM's via virtual functions - not simply all
> of them assign to one VM via assigning the controller like a non SR-IOV
> device
>

https://wiki.archlinux.org/index.php/PCI_passthrough_via_OVMF
https://wiki.installgentoo.com/index.php/PCI_passthrough
https://www.kernel.org/doc/Documentation/vfio.txt

The one sticking point is that you need to figure out the layout of
your PCIe lanes to share multiple devices without conflicts.

Cheers,
 R0b0t1

Re: [gentoo-user] How to use SR-IOV on a LSI RAID controller

[taii...@gmx.com]

On 03/07/2018 09:02 PM, R0b0t1 wrote:


On Wed, Mar 7, 2018 at 7:52 PM, taii...@gmx.com  wrote:

I bought a LSI-9211-8i / SAS 2008 controller which reports support for
SR-IOV in lspci and I am wondering how I can use it.

There is no info on the internet about this not even for their newer
controllers where there is a lot of advertising about SR-IOV.

The idea is that you can assign a RAID array, individual hard drive, etc to
a VF which is then assigned to a VM via IOMMU providing better almost native
performance vs emulated disks.

Thanks!

If it supports SR-IOV you can pass it to a guest with VFIO. If it did
not support SR-IOV it would not support VFIO.
I know - my question is how do I create the virtual functions and assign 
the drives to them instead of simply attaching the entire controller?


According to LSI's press release you could have for instance 5 different 
RAID's assigned to 5 different VM's via virtual functions - not simply 
all of them assign to one VM via assigning the controller like a non 
SR-IOV device

[gentoo-user] Re: repair FAT-fs

[Kai Krakow]

Am Fri, 02 Mar 2018 22:17:02 -0700 schrieb thelma:

>>> I 've "dosfstools" installed but I can not run: dosfsck - it doesn't exist.
>> 
>> 
>> Try 'fsck.vfat' instead. There is also 'fsck.fat' or 'fsck.exfat', at least 
>> on my installation.
> 
> I've tried: 
> fsck.vfat -v -a -w /dev/sdb1
> fsck.fat 4.0 (2016-05-06)
> open: No such file or directory
> 
> This doesn't work either:
> fdisk /dev/sdb
> 
> Welcome to fdisk (util-linux 2.28.2).
> Changes will remain in memory only, until you decide to write them.
> Be careful before using the write command.
> 
> fdisk: cannot open /dev/sdb: No such file or directory
> 
> 
> Here is a dmesg:
> 
> [10930879.950647] usb-storage 8-1:1.0: USB Mass Storage device detected
> [10930879.950742] scsi host8: usb-storage 8-1:1.0
> [10930881.068652] scsi 8:0:0:0: Direct-Access Kingston DataTraveler G3  
> PMAP PQ: 0 ANSI: 4
> [10930881.068839] sd 8:0:0:0: Attached scsi generic sg2 type 0
> [10930882.544966] sd 8:0:0:0: [sdb] 30489408 512-byte logical blocks: (15.6 
> GB/14.5 GiB)
> [10930882.545153] sd 8:0:0:0: [sdb] Write Protect is off
> [10930882.545155] sd 8:0:0:0: [sdb] Mode Sense: 23 00 00 00
> [10930882.545283] sd 8:0:0:0: [sdb] No Caching mode page found
> [10930882.545284] sd 8:0:0:0: [sdb] Assuming drive cache: write through
> [10930882.567263]  sdb: sdb1
> [10930882.568351] sd 8:0:0:0: [sdb] Attached SCSI removable disk
> [10930887.640395] FAT-fs (sdb1): Volume was not properly unmounted. Some data 
> may be corrupt. Please run fsck.

This message is probably an artifact of what follows.

> [10930894.488038] sd 8:0:0:0: [sdb] tag#0 FAILED Result: hostbyte=DID_ERROR 
> driverbyte=DRIVER_SENSE
> [10930894.488041] sd 8:0:0:0: [sdb] tag#0 Sense Key : Hardware Error 
> [current] 
> [10930894.488043] sd 8:0:0:0: [sdb] tag#0 Add. Sense: No additional sense 
> information
> [10930894.488045] sd 8:0:0:0: [sdb] tag#0 CDB: Synchronize Cache(10) 35 00 00 
> 00 00 00 00 00 00 00

This USB thumb drive is quite obviously broken, or incompatible with your
USB controller. Try a different port or different system. Otherwise,
throw it away and learn not to store important stuff on thumb drives.

Most USB thumb drive use terrifying cheap and weak storage chips, sometimes
supporting only hundreds of write cycles. It's going to break more soon
than later, especially if you write a lot or leave it in the drawer without
connection to a power source for weeks or months.

Some sticks are even crafted in a way to support heavy write-cycles only
where the FAT table is going to be. Reformatting or putting something other
on it than FAT can have catastrophic consequences after a short time.

I was able to completely destroy some cheap USB sticks within a few weeks
by putting f2fs on them.


> [10930894.497472] usb 8-1: USB disconnect, device number 106
> [10932073.936844] usb 3-1: USB disconnect, device number 19

This message means: disconnect, the device node is gone.

> [10932092.353300] usb 3-1: new high-speed USB device number 20 using ehci-pci
> [10932092.473483] usb 3-1: New USB device found, idVendor=1043, idProduct=8012
> [10932092.473486] usb 3-1: New USB device strings: Mfr=1, Product=2, 
> SerialNumber=0
> [10932092.473487] usb 3-1: Product: Flash Disk
> [10932092.473488] usb 3-1: Manufacturer: Generic


In the future, please ensure to post complete logs right from the
beginning without hiding the important stuff. ;-)


BTW: dosfsck is afair part of the mtools package. On a modern system,
use the fsck.{vfat,fat} equivalents. The message you got tells you
that the device was not found, not that the tool was not found:

> I've tried: 
> fsck.vfat -v -a -w /dev/sdb1
> fsck.fat 4.0 (2016-05-06)
  
This comes from the tool starting, so it's there.

> open: No such file or directory
  ^^
This is an error message from the tool, it could not open the device.


-- 
Regards,
Kai

Replies to list-only preferred.