Hello there,
I'm using a Quantum LTO-7 HH drive with Ultrium LTO-7 tapes.
The streamer is connected on a SAS HAB microsemi 1100-4i.
I set the Maximum block size = 524288
and run: speed file_size=3 skip_raw
with zero data and bacula block structure Total Write rate = *311.7 MB/s*
with random data: Total Write rate = *94.74 MB/s*
For backup I use the spooling function. Two SATA hdd's are build a
RAID-0 (stripe) array.
This array is used for holding the spooling data (spool directory)
testing:
**** write test ****
dd if=/dev/zero of=/backup_spool/testfile bs=1M count=204800
conv=fdatasync,notrunc
204800+0 Datensätze ein
204800+0 Datensätze aus
214748364800 bytes (215 GB, 200 GiB) copied, 596,839 s, *360 MB/s*
**** read test ****
dd if=/backup_spool/testfile of=/dev/null bs=1M count=204800
204800+0 Datensätze ein
204800+0 Datensätze aus
214748364800 bytes (215 GB, 200 GiB) copied, 625,029 s, *344 MB/s*
Have made test backup (1,1 TByte) and have monitored a constant write
rate of 200 MByte/s during despooling.
Are the write values of the tape drive OK for a LTO-7 environment?
Thanks for any hints, Frank
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