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/
