Arno Lehmann wrote:
> Hello,
>
> 18.12.2009 14:38, Oliver Lehmann wrote:
> > Dan Langille writes:
> >
> >> Have you considered that perhaps your backup is corrupted? That is, the
> >> USB2 HDD that you have backed up to contains a disk error?
> >>
> >> I would be very careful with that HDD, whatever you do, especially if
> >> that is your only backup of this data.
>
> I agree with Dan... I see the same sort of problems relatively often
> (15 times during the last 3 months), but I know *I* can accept that
> fault rate.
>
> This happens, as far as I can see, only with external drives (USB in
> your and other cases, FireWire here), so I attribute it to imperfect
> external disk controller chips or USB / FireWire stacks. Whenever I
> saw those sort of errors on internal disks, I either get log messages
> or can identify faulty disk drives using smartctl. For external disks,
> this usually doesn't work. :-(
The SMART test is done but smartctl -l selftest gave me that no test was
done at all. So who knows maybe this test does not work if requested over
USB. Who knows what the USB chip makes out of it. But beside this I see
now big problems in the SMART output
root@nudel olivleh1> smartctl -A -d usbsunplus /dev/da1
smartctl 5.39 2009-10-12 r2957 [FreeBSD 8.0-STABLE i386] (local build)
Copyright (C) 2002-9 by Bruce Allen, http://smartmontools.sourceforge.net
=== START OF READ SMART DATA SECTION ===
SMART Attributes Data Structure revision number: 16
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED
WHEN_FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x002f 200 200 051 Pre-fail Always
- 0
3 Spin_Up_Time 0x0027 160 160 021 Pre-fail Always
- 7000
4 Start_Stop_Count 0x0032 100 100 000 Old_age Always
- 71
5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always
- 0
7 Seek_Error_Rate 0x002e 100 253 000 Old_age Always
- 0
9 Power_On_Hours 0x0032 094 094 000 Old_age Always
- 5103
10 Spin_Retry_Count 0x0032 100 253 000 Old_age Always
- 0
11 Calibration_Retry_Count 0x0032 100 253 000 Old_age Always
- 0
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always
- 32
192 Power-Off_Retract_Count 0x0032 200 200 000 Old_age Always
- 7
193 Load_Cycle_Count 0x0032 200 200 000 Old_age Always
- 71
194 Temperature_Celsius 0x0022 108 095 000 Old_age Always
- 42
196 Reallocated_Event_Count 0x0032 200 200 000 Old_age Always
- 0
197 Current_Pending_Sector 0x0032 200 200 000 Old_age Always
- 0
198 Offline_Uncorrectable 0x0030 200 200 000 Old_age Offline
- 0
199 UDMA_CRC_Error_Count 0x0032 200 200 000 Old_age Always
- 1
200 Multi_Zone_Error_Rate 0x0008 200 200 000 Old_age Offline
- 0
> No, none that I know. An actual restore is the only way to find this.
> To make sure your restores don't fail, run the SD with '-p', and
> *really close watch for those errors in the reports*.
man bacula-sd does not reveal a -p switch? Where do I have to specify
it and what will it do?
Looks like I really have to schedule a restore job - at least for the
Full and Diff backups. Bad when the Full backup is broken and all the
other stuff which depends on it gets rendered useless. I only make Full
backups once a month.
--
Oliver Lehmann
http://www.pofo.de/
http://wishlist.ans-netz.de/
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