HP A3550A User Manual - A3661-90001 - Page 157

Creating Logical Disk Units (LUNs)

4-21

Grid Manager

Logical Unit Number (LUN)

7KH´GHIDXOWÓRJLFDO´XQLW´QXPEHU´Á/81Â´LV´WKH´QH[W´KH[DGHFLPDO´QXPEHU´DYDLODEOH»´VWDUWLQJ´ZLWK´

¹µ´7KHÍLUVW´/81ÉRXQG»ÚHJDUGOHVV´RI´WKH´QXPEHU´RI´63V´RU´KRVWV´DWWDFKHG´WR´WKLV´GLVN´DUUD\»´KDV´

WKH´GHIDXOW´QXPEHU´¹»´WKH´VHFRQG´±»´WKH´WKLUG´²»´DQG´VR´RQµ´,W´LV´SRVVLEOH´WR´VSHFLI\´D´QRQ¸GHIDXOW´

QXPEHU´ÁKH[DGHFLPDOÂµ´)RU´WKH´QH[W´/81ÉRXQG»´WKH´GHIDXOW´QXPEHU´LV´WKHÓRZHVW´QXPEHU´QRW´LQ´

XVHµ

:KHQÉLQGLQJ´D´JOREDO´KRW´VSDUH»´WKH´/81´QXPEHU´DVVLJQHG´LV´XVHG´RQO\´ZKLOH´WKH´JOREDO´KRW´

VSDUH´LV´RQ´VWDQGE\µ´:KHQ´WKH´JOREDO´KRW´VSDUH´LV´LQWHJUDWHG´LQWR´D´GLVN´JURXS»´LW´WDNHV´WKDW´

JURXSÀV´/81´QXPEHUµ´:KHQ´LWÚHWXUQV´WR´JOREDO´KRW´VSDUH´VWDWXV»´LWÚHJDLQV´LWV´RULJLQDO´/81´

QXPEHUµ

2QO\´/81V´QXPEHUHG´¹´WKURXJK´¼´VKRXOGÉHÉRXQGÉHFDXVH´6&6,¸²´VSHFLILHV´RQO\´WKUHHÉLWVÍRU´

WKH´/81ÍLHOGµ´7KLVÓLPLWV´WKH´QXPEHU´RI´/81V´WR´HLJKW´ZLWKÝDOLGÝDOXHV´RI´¹´WKURXJK´¼µ

Note

The operating system recognizes LUNs 0 through 7 only.

Maximum Rebuild Time

7KH´PD[LPXPÚHEXLOG´WLPH´VSHFLILHV´WKH´PD[LPXP´QXPEHU´RI´KRXUV´WKH´GLVN´DUUD\´FDQ´WDNH´WR´

LQWHJUDWH´D´JOREDO´KRW´VSDUH´RU´QHZ´GLVN´PRGXOH´ÁLQVHUWHG´WRÚHSODFH´D´GHIHFWLYH´RQHÂ´LQWR´WKH´

JURXSµ´7KHÍRXU¸KRXU´GHIDXOWÝDOXH´LVÚHFRPPHQGHGµ´6HOHFWLQJÓRZHUÚHEXLOG´WLPHV´LPSDFWV´

V\VWHP´SHUIRUPDQFHµ´7KHÚHEXLOG´WLPH´FDQÉH´FKDQJHG´ZLWK´*ULG´0DQDJHUÓDWHU´ZLWKRXW´

GDPDJLQJ´WKH´LQIRUPDWLRQ´VWRUHG´RQ´WKH´/81µ´+RZHYHU»´FKDQJLQJ´WKHÚHEXLOG´WLPH´GXULQJ´D´

UHEXLOG´GRHV´QRW´VSHHG´XS´WKHÚHEXLOG´DQG´GRHV´QRW´WDNH´DIIHFW´XQWLO´WKH´FXUUHQWÚHEXLOG´KDV´

FRPSOHWHGµ

Sectors per Stripe Element

7KH´QXPEHU´RI´VHFWRUV´SHU´VWULSH´HOHPHQW´VSHFLILHV´WKH´VWULSH´VL]H´LQ´¿±²¸E\WH´GLVN´VHFWRUV´RQ´

HDFK´GLVN´LQ´WKH´5$,’´JURXSµ´7KH´VWULSH´HOHPHQW´VL]H´VSHFLILHG´KHUHÉHFRPHV´DQ´LQWHJUDO´SDUW´RI´

WKH´/81µ´,W´FDQQRWÉH´FKDQJHG´ZLWKRXW´XQELQGLQJ´WKH´/81»´ZKLFK´GHVWUR\V´DOO´GDWD´RQ´LWµ

Enable Caches (LUN Cache)

/81´FDFKLQJ´ZRUNV´RQO\´LI´GLVN´DUUD\´FDFKLQJ´LV´HQDEOHGµ

7KUHH´RSWLRQV´DUH´DYDLODEOHÍRU´/81´FDFKLQJÃ

HP A3550A User Manual - A3661-90001 - Page 157

Logical Unit Number LUN, Maximum Rebuild Time, Sectors per Stripe Element, Enable Caches LUN Cache

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