CONTACTS 
0201 - Exabyte Corporation                  800 392 2983 fax or 800...
020101 - Ms. Carrie Shaw; Customer Rep  =Telephone
020102 - Technical Support
0202 - Exabyte Corporation                  800 392 2983 fax or 800...
020201 - Mr. Michael Goff; Customer Rep  =Telephone
020202 - michael@exabyte.com
020203 - Technical Support

SUBJECTS
Exabyte Tape 20 Failed During Backup
C13 Backup Failed Using Tape #20
279596 Called Exabyte on Problem for 010403 re Tape #21
Returned 45 M Tapes All Seem to Have Failed
Evaluation

1307 -    ..
1308 - Summary/Objective
1309 -
130901 - Follow up ref SDS 30 0000, ref SDS 29 0000.
130902 -
130903 - On 020417 called Exabyte technical support, ref SDS 30 0001, to
130904 - inquire about receipt of tapes submitted on 020408. ref SDS 29 0001
130905 -
130906 - Was unable to make contract on 020417, so today submitting letter to
130907 - verify receipt of tapes and inquire about progress.
130908 -
130909 - Submitted ref DIT 1 0001 to Mike Geoff with link to the record on
130910 - 020408 and the letter sent that day, ref DIP 2 0001, notifying of
130911 - transmitting tapes listed on 020408, ref SDS 29 NN4G, per instructions
130912 - to use the problem number...
130913 -
130914 -
130915 -                           279596
130916 -
130917 -
130918 - ...from Carrie also on 020408. ref SDS 29 OQ8J
130919 -
130920 -      [On 020430 contacted Exabyte about progress. ref SDS 31 0001
130921 -
130922 -      [On 020507 contacted Exabyte Sales about progress; submitted
130923 -      confirming letter. ref SDS 32 0001
130924 -        ..
130925 -    1.  Have been consistently getting about 200 MB/Min for
130926 -        backup using Exabyte Mammoth LT tape drive, as shown by the
130927 -        record on...
130928 -
130929 -                               011002, ref SDS 12 0001
130930 -                               011107. ref SDS 21 0001
130931 -                               011127. ref SDS 20 M75O
130932 -                               011212. ref SDS 22 0001
130933 -                               020104. ref SDS 23 0001
130934 -                               020201. ref SDS 24 0001
130935 -
130936 -    2.  On 011005 Mike recommended upgrading the Jazjet SCSI controller
130937 -        in order to improve performance. ref SDS 14 H64G
130938 -
130939 -        On 011008 SCSI Stuff recommended using Adaptec 19160.
130940 -        ref SDS 16 0001
130941 -        ..
130942 -        On 011010 installed 19160 and encountered problems
130943 -        terminating SCSI bus because Exabyte tape drive does not
130944 -        provide this feature. ref SDS 17 DE7G
130945 -
130946 -        Backup rate was 50% slower with new Adaptec controller.
130947 -
130948 -    3.  On 011011 Exabyte recommended updating firmware, ref SDS 18
130949 -        SN3I, and purchasing additional equipment to terminate SCSI
130950 -        bus. ref SDS 18 6U7H
130951 -
130952 -    4.  Mammoth LT tape drive should perform within the range of 200
130953 -        MB/Min to 300 MB/Min, reported by Exabyte on 011011.
130954 -        ref SDS 18 RM9K
130955 -
130956 -            [On 020507 Amanda advised expected DTR range for Mammoth LT
130957 -            tape drive is 120 - 240 MB/min. ref SDS 32 YH4G
130958 -        ..
130959 -    5.  On 011027 after updating firmware and installing new
130960 -        equipment to terminate SCSI bus, ref SDS 20 0001, backup was
130961 -        about 100 MB/Min with new Adaptec 19160 controller, so switched
130962 -        back to JazJet adapter because it had been performing at about
130963 -        200 MB/Min. ref SDS 20 021G  Testing showed this configuration
130964 -        still performed at about 200 MB/Min, which is 100% faster than
130965 -        using the Adaptec 19160 controller. ref SDS 20 M75O
130966 -        ..
130967 -    6.  Subsequently, on March 7 more evidence accumulated
130968 -        indicating that the problem of failed backups was using 45M
130969 -        tapes. Further experience on April 4 pointed to the 45M tapes.
130970 -        Carrie Shaw in the Exabyte technical support department noted
130971 -        on April 8 that 45M tapes may not be compatible with high end
130972 -        systems. Yesterday, I installed the Adaptec 19160 SCSI adapter
130973 -        in the computer again to see if this would run faster with the
130974 -        125M tapes.  It still runs at about 100 MB per minute per
130975 -        original experience reported on 011010.  I therefore removed
130976 -        the Adaptec 19160 controller and installed the JazJet which
130977 -        previously had performed at about 200 MB/Minute. However, it
130978 -        too is now performing at about 100 MB/Minute. Thus, something
130979 -        has caused a 50% drop in performance.
130980 -        ..
130981 -    7.  This is occurring using Windows 2000 on a 1.4 MHz system
130982 -        with 520 MB RAM and a 46 GB drive, which was fairly high-end a
130983 -        year ago, but is now a medium machine. ref DIT 1 3C48 Does
130984 -        Exabyte have any issues with W2K and/or Pentium IV systems that
130985 -        show performance falls below the 200 - 300 MB/Min DTR which
130986 -        Exabyte expects for the Mammoth LT, as reported on 011011?
130987 -        ref SDS 18 RM9K  For example, on 011005 Mike explained one
130988 -        issue that slows performance. ref SDS 14 2T15  In recent weeks,
130989 -        W2K longer to shut down, but have not noticed other apparent
130990 -        performance issues with W2K. Can you provide support to get us
130991 -        back to at least 200 MB/Minute?
130992 -
130993 -    8.  On 020321 we installed McAfee virus protection. ref SDS 26 0001
130994 -        Could this be a factor?  Are there issues between McAfee and
130995 -        backing up? ref DIT 1 KE5G
130996 -
130997 -            [On 020507 Amanda advised expected DTR range for Mammoth LT
130998 -            tape drive is 120 - 240 MB/min. ref SDS 32 YH4G
130999 -
131000 -
131001 -
131002 -
131003 -
131004 -
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131010 -