I'm expanding my RAID array (Linux software RAID) and have run into what appears to be a hard limit of 16TB on the XFS file system. Poking around on Google seems to indicate that this is a result of my machine being 32-bit. So I looked up some relevant info on my machine...
## cat /proc/cpuinfo processor : 0 vendor_id : AuthenticAMD cpu family : 16 model : 6 model name : AMD Sempron(tm) 140 Processor stepping : 2 cpu MHz : 2699.746 cache size : 1024 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 5 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 syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc up nonstop_tsc extd_apicid pni monitor cx16 popcnt lahf_lm svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt bogomips : 5399.49 clflush size : 64 cache_alignment : 64 address sizes : 48 bits physical, 48 bits virtual power management: ts ttp tm stc 100mhzsteps hwpstate
## uname -a Linux gibson 188.8.131.52-smp #2 SMP Wed May 12 22:47:36 CDT 2010 i686 AMD Sempron(tm) 140 Processor AuthenticAMD GNU/Linux
I'm far from an expert in Linux system administration or kernel configuration. However, it appears to me that my CPU is 64-bit but it's just the kernel that's keeping things 32-bit. Is that correct? (This question points me to the
i686 in the
uname output as a clue.)
I found a post online which gives hope that I may just be able to re-compile my kernel with 64-bit support. But I've never actually done that before. (At least, not on a system the functioning of which I consider to be critically important.)
Is this something that can easily be done? Does anybody have a good (and simple) walkthrough of a kernel re-compile (including rollback and recovery tips if the computer fails to use the new kernel) and can maybe point me to the specific
make menuconfig options I need to set?
For reference, I'm running Slackware 13.1.0 with Linux 184.108.40.206