Access beyond end of device

Access beyond end of device

[Luiz Fernando N. Capitulino]

 Hello,

 Since I've started using the pata_via driver in 2.6.22, I'm getting
zillions of these messages:

"""
attempt to access beyond end of device
sda: rw=0, want=156367809, limit=156365903
printk: 22 messages suppressed
Buffer I/O error on device sda1, logical block 78183872
...
"""

 It also does happen with 2.6.23-rc3.

 Controller:

"""
00:0f.1 IDE interface: VIA Technologies, Inc. VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06) (prog-if 8a [Master SecP PriP])
"""

-- 
Luiz Fernando N. Capitulino

Re: Access beyond end of device

[Luiz Fernando N. Capitulino]

Em Tue, 31 Jul 2007 15:04:14 -0300
"Luiz Fernando N. Capitulino" <lcapitulino@mandriva.com.br> escreveu:

|  Since I've started using the pata_via driver in 2.6.22, I'm getting
| zillions of these messages:
| 
| """
| attempt to access beyond end of device
| sda: rw=0, want=156367809, limit=156365903
| printk: 22 messages suppressed
| Buffer I/O error on device sda1, logical block 78183872
| ...
| """
| 
|  It also does happen with 2.6.23-rc3.

 Heh, I'm pretty advanced, I meant 2.6.23-rc1.

-- 
Luiz Fernando N. Capitulino

Re: Access beyond end of device

[Alan Cox]

On Tue, 31 Jul 2007 15:15:46 -0300
"Luiz Fernando N. Capitulino" <lcapitulino@mandriva.com.br> wrote:

> Em Tue, 31 Jul 2007 15:04:14 -0300
> "Luiz Fernando N. Capitulino" <lcapitulino@mandriva.com.br> escreveu:
> 
> |  Since I've started using the pata_via driver in 2.6.22, I'm getting
> | zillions of these messages:
> | 
> | """
> | attempt to access beyond end of device
> | sda: rw=0, want=156367809, limit=156365903
> | printk: 22 messages suppressed
> | Buffer I/O error on device sda1, logical block 78183872

Does your disk have a host protected area set and if so are you telling
libata to disable it ?

Re: Access beyond end of device

[Luiz Fernando N. Capitulino]

Em Wed, 1 Aug 2007 01:12:26 +0100
Alan Cox <alan@lxorguk.ukuu.org.uk> escreveu:

| On Tue, 31 Jul 2007 15:15:46 -0300
| "Luiz Fernando N. Capitulino" <lcapitulino@mandriva.com.br> wrote:
| 
| > Em Tue, 31 Jul 2007 15:04:14 -0300
| > "Luiz Fernando N. Capitulino" <lcapitulino@mandriva.com.br> escreveu:
| > 
| > |  Since I've started using the pata_via driver in 2.6.22, I'm getting
| > | zillions of these messages:
| > | 
| > | """
| > | attempt to access beyond end of device
| > | sda: rw=0, want=156367809, limit=156365903
| > | printk: 22 messages suppressed
| > | Buffer I/O error on device sda1, logical block 78183872
| 
| Does your disk have a host protected area set and if so are you telling
| libata to disable it ?

 Ok, the disk has a host protected area and now I'm telling libata to
disable it.

 The error messages has disappeared.

 But... Is it safe to do it? I've read somewhere that the BIOS and
other softwares may use that area.

 Also, I remember that with the IDE driver I wasn't seeing that
messages, which means either: it was disabling it by default or
was just ignoring it.

-- 
Luiz Fernando N. Capitulino

Re: Access beyond end of device

[Alan Cox]

>  Ok, the disk has a host protected area and now I'm telling libata to
> disable it.
> 
>  The error messages has disappeared.
> 
>  But... Is it safe to do it? I've read somewhere that the BIOS and
> other softwares may use that area.

On some systems. Its also used for different things on others (rounding
off disk sizes nicely, clipping to avoid bios limits etc)


>  Also, I remember that with the IDE driver I wasn't seeing that
> messages, which means either: it was disabling it by default or
> was just ignoring it.

Old IDE disables it by default, libata is more conservative. Personally I
think libata should disable it by default too but thats an argument to
have with Jeff