I do not see the bug when booting in precise using the oneiric kernel
3.0.0-16-generic
I do see the same bug in 3.1: ~kernel-ppa/mainline/v3.1.10-precise -
the Ubuntu build of the mainline 3.1.10 kernel: 3.1.10-030110-generic
#201201181135
So it looks like a regression in the mainline kernel 3.1
And I hate it when my logs and consoles get filled up with stuff that
doesn't otherwise matter :/
The code that prints the KERN_NOTICE messages is in
linux/drivers/scsi/sd.c, and says it is only called when
sd_revalidate_disk() is called. Why would that be called every 52
seconds? Here are some snippets from around each of the three messages:
* ... read write protect setting, if possible - called only in
sd_revalidate_disk()
sd_read_write_protect_flag(struct scsi_disk *sdkp, unsigned char *buffer)
{....
if (sdp->skip_ms_page_3f) {
sd_printk(KERN_NOTICE, sdkp, "Assuming Write Enabled\n");
...
if (!scsi_status_is_good(res)) {
sd_printk(KERN_WARNING, sdkp,
"Test WP failed, assume Write Enabled\n");
...
sd_read_cache_type - called only from sd_revalidate_disk()
....
if (scsi_sense_valid(&sshdr) &&
sshdr.sense_key == ILLEGAL_REQUEST &&
sshdr.asc == 0x24 && sshdr.ascq == 0x0)
/* Invalid field in CDB */
sd_printk(KERN_NOTICE, sdkp, "Cache data unavailable\n");
else
sd_printk(KERN_ERR, sdkp, "Asking for cache data failed\n");
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https://bugs.launchpad.net/bugs/925760
Title:
Constant warnings from the kernel: Test WP failed, assume Write
Enabled
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