[Linux-cluster] How to re-store my lost data

Luis Cebamanos luiceur at gmail.com
Thu Jan 6 19:36:16 UTC 2011


Is a cluster with 16 nodes and I suspect the problem is in the head node:
$cat /proc/version
Linux version 2.6.11.4-21.11-smp (geeko at buildhost) (gcc version 3.3.5 
20050117 (prerelease) (SUSE Linux)) #1 SMP Thu Feb 2 20:54:26 GMT 2006

$cat /proc/cpuinfo
processor    : 0
vendor_id    : AuthenticAMD
cpu family    : 15
model        : 37
model name    : AMD Opteron(tm) Processor 246
stepping    : 1
cpu MHz        : 1994.349
cache size    : 1024 KB
physical id    : 255
siblings    : 1
fpu        : yes
fpu_exception    : yes
cpuid level    : 1
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca 
cmov pat pse36 clflush mmx fxsr sse sse2 pni syscall nx mmxext fxsr_opt 
lm 3dnowext 3dnow pni lahf_lm
bogomips    : 3923.96
TLB size    : 1024 4K pages
clflush size    : 64
cache_alignment    : 64
address sizes    : 40 bits physical, 48 bits virtual
power management: ts fid vid ttp


processor    : 1
vendor_id    : AuthenticAMD
cpu family    : 15
model        : 37
model name    : AMD Opteron(tm) Processor 246
stepping    : 1
cpu MHz        : 1994.349
cache size    : 1024 KB
physical id    : 255
siblings    : 1
fpu        : yes
fpu_exception    : yes
cpuid level    : 1
wp        : yes
flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca 
cmov pat pse36 clflush mmx fxsr sse sse2 pni syscall nx mmxext fxsr_opt 
lm 3dnowext 3dnow pni lahf_lm
bogomips    : 3981.31
TLB size    : 1024 4K pages
clflush size    : 64
cache_alignment    : 64
address sizes    : 40 bits physical, 48 bits virtual
power management: ts fid vid ttp

cat /proc/meminfo #
MemTotal:      2055264 kB
MemFree:       1781708 kB
Buffers:         96696 kB
Cached:          99892 kB
SwapCached:          0 kB
Active:         114836 kB
Inactive:        98388 kB
HighTotal:           0 kB
HighFree:            0 kB
LowTotal:      2055264 kB
LowFree:       1781708 kB
SwapTotal:     4192924 kB
SwapFree:      4192924 kB
Dirty:              52 kB
Writeback:           0 kB
Mapped:          28104 kB
Slab:            43688 kB
CommitLimit:   5220556 kB
Committed_AS:   232052 kB
PageTables:       1512 kB
VmallocTotal: 34359738367 kB
VmallocUsed:      2412 kB
VmallocChunk: 34359735867 kB
HugePages_Total:     0
HugePages_Free:      0
Hugepagesize:     2048 kB

df -T
Filesystem    Type   1K-blocks      Used Available Use% Mounted on
/dev/sda2     ext3    33032228  19971720  11382520  64% /
tmpfs        tmpfs     1027632         0   1027632   0% /dev/shm
/dev/sda1     ext3      124427      9412    108591   8% /boot
/dev/sda6     ext3     2063504     33820   1924864   2% /tmp
/dev/sda9     ext3   166698068 119970708  38259504  76% /users
/dev/sda8     ext3    32250392    966320  29645848   4% /usr/local
/dev/sda7     ext3     2063504    901804   1056880  47% /var

We were trying to install new hard drives to the system but something 
that we don't know went wrong and it ended up in almost 4 years of work 
lost!!!
Please, let me know what else can I do to be able to get the data back!

Best
On 01/05/2011 04:28 PM, Digimer wrote:
> On 01/05/2011 11:08 AM, Luis Cebamanos wrote:
>> Dear everyone!
>>
>> we have recently had an unknown problem with our cluster and we have
>> lost some data, including the latest user accounts created.
>> Does anyone have any idea of how to recover those user accounts and data?
>> The data haven't been deleted so it should be in somewhere in the disk!!!
>>
>> Please, any help would be much more appreciated.
>>
>>
>> Best,
>>
>> Luis
> Please provide more details. Specifically, what file system? How did the
> data loss occur (as best as you know)? What versions of what cluster
> applications? What has been done since then? Where and how was the data
> stored? etc.
>




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