4.4  Data Transfer Rate Performance Results Figures 4.1-4.4 summarize read/write performance statistics of IBM Ultrium 2 and IBM Ultrium 1 at various block sizes and data pattern compression ratios.   y IBM Ultrium 2 ( 5 data patterns, 11 block sizes) y IBM Ultrium 1 ( 5 data patterns, 11 block sizes) y IBM Ultrium 2 vs IBM Ultrium 1 ( 1:1 compressible data) y IBM Ultrium 2 vs IBM Ultrium 1 ( 2:1 compressible data) Figure 4.1 shows the IBM Ultrium 2 data rate in MB/sec for five different data patterns at 11 different block sizes.     Figure 4.1:  IBM Ultrium 2 Read/Write Performance 512 1024 2048 4096 8192 16384 32768 65536 131072 262144 524288 Block size (bytes) 0 20 40 60 80 100 120 1:1 2:1 3:1 max:1 random Writes - Ultrium2 512 1024 2048 4096 8192 16384 32768 65536 131072 262144 524288 Block size (bytes) 0 20 40 60 80 100 120 1:1 2:1 3:1 max:1 random Reads - Ultrium2 Page 8 of 20 p1   p2   p3   p4   p5   p6   p7   p8   p9   p10   p11   p12
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