Re: udev problems

[Kay Sievers <kay.sievers@vrfy.org>]

On Sun, 2004-03-07 at 15:20, Michal Èihaø wrote:
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> 
> On Sunday 07 of March 2004 15:05, Kay Sievers wrote:
> > Whats in dmesg? I have the following for my cheap 4slot-reader:
> 
> [connect reader]
> 
> USB Mass Storage device found at 21
> usb 1-2: USB disconnect, address 21
> usb 1-2: new full speed USB device using address 22
> scsi34 : SCSI emulation for USB Mass Storage devices
>   Vendor: Apacer    Model: Mega Steno        Rev: 1.03
>   Type:   Direct-Access                      ANSI SCSI revision: 02
> Attached scsi removable disk sda at scsi34, channel 0, id 0, lun 0
>   Vendor: Apacer    Model: Mega Steno        Rev: 1.03
>   Type:   Direct-Access                      ANSI SCSI revision: 02
> Attached scsi removable disk sdb at scsi34, channel 0, id 0, lun 1
>   Vendor: Apacer    Model: Mega Steno        Rev: 1.03
>   Type:   Direct-Access                      ANSI SCSI revision: 02
> Attached scsi removable disk sdc at scsi34, channel 0, id 0, lun 2
> WARNING: USB Mass Storage data integrity not assured
> 
> [now I read from /dev/sda]
> 
> USB Mass Storage device found at 22
> SCSI device sda: 15680 512-byte hdwr sectors (8 MB)
> sda: assuming Write Enabled
> sda: assuming drive cache: write through
> SCSI device sda: 15680 512-byte hdwr sectors (8 MB)
> sda: assuming Write Enabled
> sda: assuming drive cache: write through
>  sda: sda1
> 
> > sdb: Spinning up disk....ready
> 
> This doesn't happen to me. Related kernel code is in drivers/scsi/sd.c:
> 
>                 /*
>                  * If manual intervention is required, or this is an
>                  * absent USB storage device, a spinup is meaningless.
>                  */
>                 if (SRpnt->sr_sense_buffer[2] = NOT_READY &&
>                     SRpnt->sr_sense_buffer[12] = 4 /* not ready */ &&
>                     SRpnt->sr_sense_buffer[13] = 3) {
>                         break;          /* manual intervention required */
> 
>                 /*
>                  * Issue command to spin up drive when not ready
>                  */
>                 } else if (SRpnt->sr_sense_buffer[2] = NOT_READY) {
>                         unsigned long time1;
>                         if (!spintime) {
>                                 printk(KERN_NOTICE "%s: Spinning up disk...",
>                                        diskname);
>                 }
> 

Ah, nice to know.
You may access you device with your apacer.sh to revalidate. (?)
Just create a temporary node, access and remove it.

Kay



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