ada disk now da disk in upgrade to 10.2 Release?

[John Howie]

Hi all,

Following up.

I verified that no changes have been made to the HyperV Cluster, and that no changes were made to /etc/fstab in the upgrade. The virtual machine (10.1-RELEASE) was installed on the HyperV Cluster from 10.1-RELEASE media, which created the ada disks and partitions (I do remember there being difficulty in setting the boot partition as active, and having to mark it manually).

Regards,

John


 



On 8/14/15, 2:37 PM, "owner-freebsd-questions at freebsd.org on behalf of John Howie" <owner-freebsd-questions at freebsd.org on behalf of john at thehowies.com> wrote:

>root at freebsd:~ # camcontrol devlist
><Msft Virtual CD/ROM 1.0>          at scbus0 target 0 lun 0 (pass0,cd0)
><Msft Virtual Disk 1.0>            at scbus1 target 0 lun 0 (da0,pass1)
>root at freebsd:~ # 
>
>
>No atacontrol :-)
>
>
>
>
>On 8/14/15, 1:51 PM, "Polytropon" <freebsd at edvax.de> wrote:
>
>>On Fri, 14 Aug 2015 20:14:35 +0000, John Howie wrote:
>>> Hi all,
>>> 
>>> I ran an upgrade via freebsd-update from 10.1-RELEASE to 10.2-RELEASE.
>>> Everything went well until the reboot after kernel updates. The kernel
>>> complained it could not find the root filesystem, which was at
>>> /dev/ada0p2. The disk no longer appears in /dev, and it is now
>>> /dev/da0p2.
>>> 
>>> The machine is running under Hyper V (a guest OS).
>>> 
>>> Does anyone have any idea why this might have happened?
>>
>>This looks like either "Hyper-V" stopped representing the
>>disk device as an AHCI device (ada driver: "ATA Direct Access
>>device driver"), and the OS now recognizes it as a SCSI
>>device (da driver: "SCSI Direct Access device driver"),
>>or the OS doesn't contain or load the ada driver for some
>>reason, which would be strange, given that the driver is
>>part of the GENERIC kernel for some time now. SATA drives
>>are commonly recognized by the AHCI driver, PATA drives
>>by the default ATA driver (ad driver: "generic ATA/ATAPI
>>disk controller driver", considered obsolete now), and
>>all other SCSI peripherials use the SCSI drivers. This
>>should be the same between 10.1 and 10.2.
>>
>>What do "camcontrol devlist" and "atacontrol list" day
>>about the recognized disks?
>>
>>
>>
>>-- 
>>Polytropon
>>Magdeburg, Germany
>>Happy FreeBSD user since 4.0
>>Andra moi ennepe, Mousa, ...
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