Hi,

We managed to up our speed of dumping and writing a whole lot by using a 
holding disk, which is great. However, the data we wrote, around 245gb, failed 
a amcheckdump and i couldnt, therefore, not amrestore anything.

After the amtapetest, i was given an output of this:

define tapetype ibm {
    comment "just produced by tapetype prog (hardware compression 
off)"
    length 402432 mbytes
    filemark 0 kbytes
    speed 57497 kps
}


However, it says in the amreport we wrote to tape at :
Avg Tp Write Rate (k/s) 90801.7    90801.7    
    -- 

Here is some of our amdump output:

driver: result time 6482.541 from taper: PARTDONE 00-00002 AmaTor-004 5 
41943040 "[sec 449.501801 kb 41943040 kps 93310.059952]"
driver: state time 6950.318 free kps: 100000 space: 719002550 
taper: writing idle-dumpers: 1 qlen tapeq: 0 runq: 0 roomq: 
0 wakeup: 0 driver-idle: no-dumpers
driver: interface-state time 6950.318 if default: free 100000
driver: hdisk-state time 6950.318 hdisk 0: free 719002550 dumpers 0
driver: result time 6950.332 from taper: PARTDONE 00-00002 AmaTor-004 6 
41943040 "[sec 466.669805 kb 41943040 kps 89877.338432]"
driver: state time 7023.335 free kps: 100000 space: 719002550 
taper: writing idle-dumpers: 1 qlen tapeq: 0 runq: 0 roomq: 
0 wakeup: 0 driver-idle: no-dumpers
driver: interface-state time 7023.335 if default: free 100000
driver: hdisk-state time 7023.335 hdisk 0: free 719002550 dumpers 0
driver: result time 7023.350 from taper: PARTDONE 00-00002 AmaTor-004 7 
5813290 "[sec 71.901664 kb 5813290 kps 80850.562791]"
driver: state time 7023.350 free kps: 100000 space: 719002550 
taper: writing idle-dumpers: 1 qlen tapeq: 0 runq: 0 roomq: 
0 wakeup: 0 driver-idle: no-dumpers
driver: interface-state time 7023.350 if default: free 100000
driver: hdisk-state time 7023.350 hdisk 0: free 719002550 dumpers 0


How can this be? our holding disk is a sata1, 1tb disk. That write rate is 
above what sata1 can give data out at, right? is this the reason for our data 
corruption?

What else could it be? Do you need anymoer info to help diagnose this? We're 
gonna hopefully try with a sata2 disk soon to see if that makes any difference. 
The tapespeed variable in amanda.conf, to my understanding, would not allow me 
to write at 90000k~. Nor would the speed of a sata1  disk.

+----------------------------------------------------------------------
|This was sent by rory AT mrxfx DOT com via Backup Central.
|Forward SPAM to abuse AT backupcentral DOT com.
+----------------------------------------------------------------------