5-74
High Availability Array Monitor (HARAYMON)
Note
It is important to be aware of the distinction between the occurrence of a failure and the
reporting of that failure.
A disk array component failure is reported immediately to the disk array. The disk array,
in turn, notifies the system of this event
when the next I/O is attempted to any disk array
component
. It is important to recognize the following:
•
The next I/O
may or may not
occur soon after the failure occurs.
•
The component on which the I/O is being attempted at that time
may or may not
be the failing component.
•
In a multi-host configuration, the system attempting the next I/O
may or may not
be the system that was using the disk array
before or during the failure.
7KH´V\VWHP´FRQVROH´PHVVDJH»´V\VWHP´ORJ´HQWU\»´DQG´H¸PDLO´PHVVDJH´DUH´DOO´SURGXFHG´RQ´WKH´V\VWHP´
RQ´ZKLFK´WKH´IDLOXUH´LV´UHSRUWHGµ´7KH´H¸PDLO´PHVVDJH´LV´VHQW´WR´XVHU»´URRW»´RQ´WKDW´V\VWHPµ
7KH´SK\VLFDO´GHYLFH´SDWK´RI´WKH´/81´UHSRUWLQJ´WKH´IDLOXUH´LV´XVHIXO´QRW´EHFDXVH´LW´LQGLFDWHV´WKH´
IDLOLQJ´/81´ÁVLQFH´WKH´IDLOLQJ´/81´DQG´UHSRUWLQJ´/81´FDQ´EH´GLIIHUHQW´EXW´EHFDXVH´LW´LQGLFDWHV´WKH´
IDLOLQJ´
GLVN²DUUD\
µ´7KLV´GLVN´DUUD\´GHVLJQDWLRQ»´WRJHWKHU´ZLWK´WKH´LGHQWLILFDWLRQ´RI´WKH´VSHFLILF´
FRPSRQHQW´ZLWKLQ´WKH´GLVN´DUUD\»´XQLTXHO\´LGHQWLILHV´WKH´IDLOLQJ´FRPSRQHQW´ZLWKLQ´WKH´RYHUDOO´
V\VWHP´FRQILJXUDWLRQµ
7KH´GLVN´DUUD\´LV´GHVLJQDWHG´E\´WKH´WDUJHW´VSHFLILFDWLRQ´LQ´WKH´SK\VLFDO´GHYLFH´SDWK»´ZKLFK´LV´WKH´
ILHOG´LPPHGLDWHO\´SUHFHGLQJ´WKH´/81µ´)RU´H[DPSOH»´LQ´WKH´SDWK´±¹Ç½µ½µ¹µ²¿¿µ¿µ½µ±»´WKH´/81´LV´±´DQG´
WKH´WDUJHW´LV´½µ´)RU´PRUH´LQIRUPDWLRQ´RQ´PDSSLQJ´D´SK\VLFDO´GHYLFH´SDWK´WR´D´)LEUH´&KDQQHO´DGGUHVV»´
VHH´WKH´
+HZOHWW±3DFNDUG²)LEUH²&KDQQHO²0DVV²6WRUDJH²$GDSWHU²6HUYLFH²DQG²8VHU²0DQXDO
½-¹³¾¸±¸´´´¿À
»´FXVWRPHU´RUGHU´QXPEHU´$¶·¶·¸³¹¹¹²µ
Note
Always check that the FAULT, REPLACE, or SERVICE LED on a suspected failing
module is lit before removing it.
%HFDXVH´RI´WKH´SRVVLEOH´GHOD\´EHWZHHQ´WKH´RFFXUUHQFH´RI´WKH´IDLOXUH´DQG´LWV´UHSRUWLQJ´E\´
+$5$<021»´WKH´WLPHVWDPS´RQ´WKH´+$5$<021´PHVVDJH´SHUWDLQLQJ´WR´D´IDLOXUH´PD\´QRW´PDWFK´WKH´
WLPHVWDPS´RQ´WKH´8QVROLFLWHG´(YHQW´/RJ´ÁDV´YLHZHG´E\´670´RU´*ULG´0DQDJHU´SHUWDLQLQJ´WR´WKH´
VDPH´IDLOXUHµ