On 9/16/18 5:24 PM, smitha sunder wrote: > On Sun, Sep 16, 2018 at 3:02 PM, Sitsofe Wheeler <sitsofe@xxxxxxxxx> wrote: >> On Sat, 15 Sep 2018 at 23:14, smitha sunder <sundersmitha@xxxxxxxxx> wrote: >>> >>> Hello all, >>> >>> I have a 30TB drive and I am running into an issue with random writes. >>> I went through this thread : >>> https://www.spinics.net/lists/fio/msg06294.html that seems to be fixed >>> already. >> >> I think that was something different regarding different blocksizes >> per direction. >> >>> I see the same issue with random reads as well. >>> So not sure what is the issue here in my case; any help is greatly appreciated. >>> >>> >>> Read Capacity results: >>> Protection: prot_en=1, p_type=1, p_i_exponent=0 [type 2 protection] >>> Logical block provisioning: lbpme=1, lbprz=1 >>> Last logical block address=58781073407 (0xdaf9fffff), Number of >>> logical blocks=58781073408 >>> Logical block length=512 bytes >>> Logical blocks per physical block exponent=3 [so physical block >>> length=4096 bytes] >>> Lowest aligned logical block address=0 >>> Hence: >>> Device size: 30095909584896 bytes, 2.87017e+007 MiB, 30095.9 GB >>> >>> >>> C:\Program Files (x86)\fio>fio --ioengine=windowsaio --group_reporting >>> --direct=1 --size=100% --bs=4K --thread --filename=\\.\PhysicalDrive1 >>> --name=precond --rw=randwrite --iodepth=1 --numjobs=1 >>> --debug=io,random >> >> <snip> >> >>> io 3372 fill: io_u 0A458780: >>> off=0x144365e7d000,len=0x0,ddir=1,file=\\.\PhysicalDrive1 >>> io 3372 get_io_u: zero buflen on 0A458780 >>> io 3372 get_io_u failed >>> io 3372 drop page cache \\.\PhysicalDrive1 >>> random 3372 off rand 17311067694306724737 >> >> That offset is crazy big - I'm sure it's bigger than a petabyte so my >> guess is that something is overflowing. If you use --size=27g does the >> job go through? >> >> [...] >> >>> I don’t see this issue if I use bs=8K or I use ba=512,8K, etc. >> >> -- >> Sitsofe | http://sucs.org/~sits/ > Hi Sitsofe, > > Thanks for the reply! > > Yes; If I use --size=27G or if provide the exact size that the OS > displays, then the job goes through. Are you running a 32-bit or 64-bit build of fio? -- Jens Axboe
