> On Sep 16, 2018, at 8:02 PM, Jens Axboe <axboe@xxxxxxxxx> wrote: > >> 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 > 32 bit. Thanks Smitha
