Maybe the message in one or other of the cases should be different?
On Fri, Apr 02, 2010 at 11:54:53AM +0100, Stuart Henderson wrote: > On 2010/04/02 11:54, Vincent wrote: > > Hi folks, > > > > One of my servers has a problem with its harddrive. To receive a warning on > > harddrive failures, I usually have the following as a cronjob: > > /sbin/atactl /dev/wd0c smartstatus >> /dev/null 2>&1 > > The output of /sbin/atactl /dev/wd0c smartstatus on that server is: No SMART > > threshold exceeded > > This issues SMART RETURN STATUS, and checks the return code from the drive. > > http://www.t13.org/Documents/UploadedDocuments/project/d1321r3-ATA-ATAPI-5.pdf > see section 8.41.7 (type '218g' if you're reading in mupdf..) > > The drive is meant to make an intelligent decisions based on it's own > interpretation of the attributes as to what return code it should use > for this. If this comes back clean, the drive thinks that it is ok. > > > However, if i use: /sbin/atactl /dev/wd0c readattr > > I receive this: > > Attributes table revision: 16 > > ID Attribute name Threshold Value Raw > > 1 Raw Read Error Rate 16 100 > > 0x000000000000 > > 2 Throughput Performance 50 100 0x000000000000 > > 3 Spin Up Time 24 120 > > 0x000300a600a5 > > 4 Start/Stop Count 0 100 > > 0x00000000001b > > 5 *Reallocated Sector Count 5 1 0x00000000075b > > 7 Seek Error Rate 67 100 > > 0x000000000000 > > ... > > One or more threshold values exceeded! > > This does a SMART READ DATA and SMART READ THRESHOLD (not in the version > of the spec in the pdf I found; register value 0xD1) and makes a simple > comparison of the values. > > > I had a look at atactl.c and noticed, that the threshold check is completely > > different! [1] > > I don't see a problem with this. In one you're asking the drive to carry > out one specific command and return the result; in the other you're asking > it to carry out a different command and return the result (the threshold > comparison in that one is something extra atactl does). > > The main value I place in the SMART commands is that they let you do > some basic tests so you can decide if it's worth rebooting to run the > vendor tools if you want to return a drive...
