md/raid10: print more useful messages on device failure.
When we get a read error on a device in a RAID10, and attempting to
repair the error fails, print more useful messages about why it
failed.
Signed-off-by: Robert Becker <Rob.Becker@riverbed.com>
Signed-off-by: NeilBrown <neilb@suse.de>
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index d9e28a6..670449f 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1488,6 +1488,7 @@
/* write it back and re-read */
rcu_read_lock();
while (sl != r10_bio->read_slot) {
+ char b[BDEVNAME_SIZE];
int d;
if (sl==0)
sl = conf->copies;
@@ -1503,9 +1504,21 @@
r10_bio->devs[sl].addr +
sect + rdev->data_offset,
s<<9, conf->tmppage, WRITE)
- == 0)
+ == 0) {
/* Well, this device is dead */
+ printk(KERN_NOTICE
+ "raid10:%s: read correction "
+ "write failed"
+ " (%d sectors at %llu on %s)\n",
+ mdname(mddev), s,
+ (unsigned long long)(sect+
+ rdev->data_offset),
+ bdevname(rdev->bdev, b));
+ printk(KERN_NOTICE "raid10:%s: failing "
+ "drive\n",
+ bdevname(rdev->bdev, b));
md_error(mddev, rdev);
+ }
rdev_dec_pending(rdev, mddev);
rcu_read_lock();
}
@@ -1526,10 +1539,22 @@
if (sync_page_io(rdev->bdev,
r10_bio->devs[sl].addr +
sect + rdev->data_offset,
- s<<9, conf->tmppage, READ) == 0)
+ s<<9, conf->tmppage,
+ READ) == 0) {
/* Well, this device is dead */
+ printk(KERN_NOTICE
+ "raid10:%s: unable to read back "
+ "corrected sectors"
+ " (%d sectors at %llu on %s)\n",
+ mdname(mddev), s,
+ (unsigned long long)(sect+
+ rdev->data_offset),
+ bdevname(rdev->bdev, b));
+ printk(KERN_NOTICE "raid10:%s: failing drive\n",
+ bdevname(rdev->bdev, b));
+
md_error(mddev, rdev);
- else
+ } else {
printk(KERN_INFO
"raid10:%s: read error corrected"
" (%d sectors at %llu on %s)\n",
@@ -1537,6 +1562,7 @@
(unsigned long long)(sect+
rdev->data_offset),
bdevname(rdev->bdev, b));
+ }
rdev_dec_pending(rdev, mddev);
rcu_read_lock();