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LTO tape drive 一問

LTO tape drive 一問

有一說法是 LTO tape drive 根本不需要 clean, 請問這說法是正確的嗎?
7 回覆

LTO tape drive 一問

Hello ericfjchen



雖然LTO(or DLT)tape medium在防刮的設計上比其它類似tape drive(dds for example)要好很多.

但只要是medium與head有接觸機會的device都需要clean(避免刮傷tape).



比較上,DDS tape要主動固定clean(once per week if dds backup every day;pnce per month if dds backup less 5 times a month),否則等"clean led"亮了再clean,head 多多少少已受刮傷,減少壽命;反之LTO head 最好等到"clean led"亮了,才被動clean,否則clean太勤反而會過度損傷head(這是為什麼一般Library clean trigger設在 "dirty detected").

所以你聽到的說法應該是"不需要主動的 clean". fyi.

LTO tape drive 一問

如果 tape drive 沒有 clean, 好像會遇到以下問題, 對嗎?

-------

>------------ Event Monitoring Service Event Notification ------------<



Notification Time: Mon Aug 1 18:06:09 2005



node02 sent Event Monitor notification information:



/storage/events/tapes/SCSI_tape/0_10_0_0.8.0.255.7.10.3

is >= 3.

Its current value is CRITICAL(5).







Event data from monitor:



Event Time..........: Mon Aug 1 18:06:09 2005

Severity............: CRITICAL

Monitor.............: dm_stape

Event #.............: 100084

System..............: node02



Summary:

Tape at hardware path 0/10/0/0.8.0.255.7.10.3 : Hardware failure





Description of Error:



While attempting to write data to its medium, the device encountered a

write error. Data loss may have occurred.



For furthur isolation of the problem, it may be possible that the

combination of values of Sense Code, Sense Qualifier and Sense Key may be

vendor specific. In that case, please contact the manufacturer of the

device. It may also be possible that the combination of SCSI Sense

Code/Qual/Key was not intended to be used by this type of device.



Probable Cause / Recommended Action:



The device has experienced a hardware failure. Contact your HP support

representative to have the device checked.



Additional Event Data:

System IP Address...: 10.84.250.120

Event Id............: 0x42edf41100000000

Monitor Version.....: B.01.05

Event Class.........: I/O

Client Configuration File...........:

/var/stm/config/tools/monitor/default_dm_stape.clcfg

Client Configuration File Version...: A.01.00

Qualification criteria met.

Number of events..: 1

Associated OS error log entry id(s):

0x42edf41100000000

Additional System Data:

System Model Number.............: 9000/800/L1500-7x

OS Version......................: B.11.11

System Fi

LTO tape drive 一問

Hello Eric,

No clean tape 所引起的問題大都是"Dirty drive detection".

EMS event 100084 大都發生在target devcie(0/10/0/0.8.0.255.7.10.3 in your case)can not found or can not access.

1.如果此device 屬於library (含FC/SCSI bridge/router)之一,則run device-mapping check map是否跑掉(map configuration issue or NSR f/w issue).

Wrokaround solution is reboot library.

2.如果此device 屬於standalone,fault led should be lit,f/w or hw replace would be the solution.



Hope this is useful for your question.

BR

消遙

LTO tape drive 一問

Hi 消遙,



此device 為 HP MSL 6060 的其中一個 tape drive, 請問該如何 run device-mapping to check map是否跑掉?



Thanks



Eric

LTO tape drive 一問

Hi 消遙,



此device 為 HP MSL 6060 的其中一個 tape drive, 請問該如何 run device-mapping to check map是否跑掉?



Thanks



Eric

LTO tape drive 一問

Hi 消遙,



此device 為 HP MSL 6060 的其中一個 tape drive, 請問該如何 run device-mapping to check map是否跑掉?



Thanks



Eric

LTO tape drive 一問

最近常收到Event Monitor notification from HP MSL 6060, 已經有定期 clean tape drive, 換一卷 tape , 也會這樣....但是 tape drive 也沒 down, 還可以用, 請問到底是有什麼問題?



Notification Time: Mon Aug 15 13:20:44 2005



node02 sent Event Monitor notification information:



/storage/events/tapes/SCSI_tape/0_10_0_0.8.0.255.7.10.1

is >= 3.

Its current value is CRITICAL(5).







Event data from monitor:



Event Time..........: Mon Aug 15 13:20:44 2005

Severity............: CRITICAL

Monitor.............: dm_stape

Event #.............: 100243

System..............: node02



Summary:

Tape at hardware path 0/10/0/0.8.0.255.7.10.1 : Media failure