About Us

Tom Ruwart's career dates back to 1977 when he started with Control Data Corporation working on disk drives. He currently specializes in analyzing and identifying performance issues in disk-based data storage systems, particulary as they apply to high performance or high end computing systems (HPC and HEC respectively).

You can contact Tom Ruwart directly at tmruwart@ioperformance.com

Autobiography in
Model Numbers and Acronyms
IBM 1402/1403/2540/3800
IBM 2311/2314/3330/3350/3380
IBM 3850 / CDC 38500
IBM 360/20/30/40/50/60/24-bit
IBM 370/145/148/155/158/165/168
IBM 4341/3031/3081/3082/31-bit
IBM 3420/3480/CDC 607/BUS/TAG
DOS/SVS/VS1/VS2/MVT/MVS
VM370/CMS/#CP/MINI-DISK
IPL/ABEND/JES/JES2/JES3/JCL
CCW/CAW/CSW/SILI/TIC/NOP
SIO/MVC/SVC/BAL/BALR/PACK
BCDIC/EBCDIC/DASD/IEFBR14
TCB/IOCB/DEB/EXCP/VSAM/QSAM
VDAM/LRECL/IEBDEBE/ERREP/R+
MC68000/68010/68020/68030
8086/8088/80186/80286/80386
Bit-slice/CISC/RISC/VLIW/MIPS
Unix/SYSV/System6/BSD/Xenix
ST506/SMD/ST412/IPI-2/SASI/SCSI
RFS/NFS/UFS/FFS/inode/dirblk
bdevsw/cdevsw/readb/writeb
zombies/children/parent/spawn
Not-a-Typewriter/tty/vi/SegV
Hello World!/a.out/cc/sh/csh/bash
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