1. Pierre-Emmanuel Brinette
Oracle T10K-C
Pierre-Emmanuel Brinette

2. DISCLAIMER
Information are stolen from a CERN benchmark report made by Vladimír Bahyl (w/o authorization)
may 2011

3. Dual heads writing 32 tracks simultaneously;
T10K-C vs T10K-B
Extract of features relevant for CERN
T10000C
T10000B
Tape Format
Linear Serpentine
Native cartridge capacity (uncompressed)
5 TB
1 TB
Head design
Dual heads writing 32 tracks simultaneously;
GMR readers
AMR readers
Native data rate performance (uncompressed)
Up to 240 MB/sec
Up to 120 MB/sec
Full tape length
1146 m
917 m
Tape speed
(low / high / locate)
3.74 / 5.62 / m/s
2 / 3.7 / 8-12 m/s
Internal data buffer
2 GB
256 MB
Small files handling functionality
File Sync Accelerator
None
Max Capacity Feature
Yes
may 2011

4. Comments New media “Max capacity” features T10000-T2
Backward compatibility with T10000-T1 for readings only
“Sport Tape” (ie: short tape) available
“Max capacity” features
Use the physical End Of Tape mark instead the logical one
Increase tape capacity by ~ 10%
Cern report usable capacity of 5510 Gb / Tape
This features already available on T10K-B
may 2011

5. may 2011

6. may 2011

7. Drives are still expensive Storage cost similar to LT04 (800 Gb)
€€€€
Drives are still expensive
T10K-C ~ €
Storage cost similar to LT04 (800 Gb)
LTO4 (800GB): € / GB
T10K-B (1TB): € / GB
T10K-C (5TB): € / GB
Library usage optimized
Up to 50 PB on a standard SL8500 !
may 2011

8. HPSS will support T10K-C in v 7.3.3 Time to fill a tape :
Comments
HPSS will support T10K-C in v 7.3.3
Patch already available for v 7.3.2
Time to fill a tape :
@ 240 MB/s : ~ 5h30
@ 50 MB/s : 27h00 !
Questions :
How the “File Sync Accelerator” could replace the HPSS file aggregation feature for small files.
HPSS ready to handle tapes with more than files ?
may 2011