[Mono-dev] DriveInfo

[Christopher Bergström]

Jonathan Pryor wrote:

>On Thu, 2006-02-09 at 14:40 +1300, Thong Nguyen wrote:
>  
>
>>I notice that there is already a UnixDriveInfo.  I'm implementing a
>>System.IO.DriveInfo that currently just reflects on UnixDriveInfo.
>>    
>>
>
>As a sanity check, you should make sure your DriveInfo members reflect
>the final .NET 2.0 DriveInfo members.  I wrote UnixDriveInfo during one
>of the .NET 2.0 betas, so it's entirely possible that they added/changed
>the members.
>
>  
>
>>UnixDriveInfo currently doesn't do any "DriveType" detection -- is there a
>>reliable POSIX way of detecting the "type" of a disk (cdrom, ram, etc).
>>    
>>
>
>If I knew of one, I'd have used it. :-)
>
>I'd love to know an answer to this one.  This information might be
>available via some ioctl(2) call, and if that's true you'll have more
>trouble than me, since you'll need to add the appropriate Win32 calls to
>I/O layer and use an internal call, since mscorlib.dll can't depend on
>Mono.Posix.dll...
>  
>
The source for hdparm and sdparm will probably show which sys calls are 
being used to get info.

hdparm -I /dev/hdx
hdparm -i /dev/hdx

>  
>
>>UnixDriveInfo.GetDrives reads fstab which doesn't work with disks mounted
>>but not listed in fstab (disks mounted manually or by automount).  Anyone
>>got any good proposals on the best way to handle this?
>>    
>>
>
>HAL?  Alas, that isn't POSIX; it's only used by Gnome afaik.
>
>This is another area that doesn't seem to be well supported by POSIX.
>  
>
eh?
cat /etc/mtab
cat /proc/mounts

Shows which drives are currently mounted.
(If proc wasn't copied and running under a chroot you won't be able to 
get it, but this may* be rare.)

there is a basic assumptions..

/dev/hdx = ata device
/dev/sdx = scsi device
/dev/md = software raid something (I might be mistaken on this.)

sata depending on the driver being used can end up being hdx or sdx

Hope this was helpful

C.